The exponential model is [tex]T(t)=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex] and It takes the cake 9.32 minutes to cool to the desired temperature
We can solve this by using Newton's Law of cooling,
[tex]T(t)=C+(T_o-C)e^k^t[/tex]
where
T(t) is the temperature at any given time
C is the surrounding temperature
T₀ is the initial temperature
k is a negative constant
t is the time
A cake recipe is baked until the center is 180 °F
T₀=180 ⇒ initial temperature
The room temperature is 69 °F
C = 69 ⇒ surrounding temperature
By using the table, substitute t and T to find the constant k
At t = 5 minutes, T = 125 °F
[tex]125=69+(180-69)e^k^t[/tex]
By subtracting 69 on both sides
[tex]56=(111)e^k^t[/tex]
Dividing both sides by 111
[tex]\frac{56}{111} =e^k^t[/tex]
Add ㏑ for both sides
[tex]ln(\frac{56}{111} )=ln(e^k^t)[/tex]
Dividing both sides by 5
k=- 0.1368357021
The exponential model is [tex]T(t)=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]
The cake cools at 100 °F and the desired temperature is 100°
T(t) = 100 ⇒ cake's temperature at t minute
Using the model above to find t
[tex]T(t)=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t\\\\100=69+(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]
Subtract 69 from both sides
[tex]39=(111)e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]
Divide both sides by 111
[tex]\frac{39}{111} =e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]
Applying ㏑ for both sides
[tex]ln(\frac{39}{111}) =e^-^1^3^6^8^3^5^7^0^2^1^t[/tex]
Dividing both sides by - 0.136835702
t=9.321711938
t ≅ 9.32 minutes
It takes the cake 9.32 minutes to cool to the desired temperature.
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find the equation of the line perpendicular to 5y = 2x - 4 which passes through (0,7)
Answer: To find the equation of a line perpendicular to another line, we need to find the negative reciprocal of the slope of the original line and use the point-slope form of a line.
The equation of the original line is 5y = 2x - 4, which we can rearrange to get y = (2/5)x - 4/5. The slope of this line is 2/5. The negative reciprocal of the slope is -5/2.
Now, we can use the point-slope form of a line, y - y1 = m(x - x1), where m is the slope and (x1, y1) is a point on the line. Substituting the slope -5/2 and the point (0, 7), we get:
y - 7 = -5/2 (x - 0)
y - 7 = -5/2 x
y = -5/2 x + 7
So the equation of the line perpendicular to 5y = 2x - 4 and passing through (0, 7) is y = -5/2 x + 7.
Step-by-step explanation:
you want to enclose a rectangular region with an area of 1200 square feet and a length of 40 feet, 50 feet, or 60 feet. find the perimeter for each possible region.
The circumference is 160 feet for a length of 40 feet. The perimeter is 200 feet for a length of 50 feet. The circumference is 240 feet for a length of 60 feet.
A rectangular region with a 1200 square foot area will have a different perimeter depending on how long it is. The perimeter will be 160 feet if the area is 40 feet long. The length of 40 feet is multiplied by four to get a final measurement of 160 feet. In a similar manner, if the area is 50 feet long, the perimeter will be 200 feet.
The length of 50 feet is multiplied by four to get a final result of 200 feet. Finally, the perimeter will be 240 feet if the area is 60 feet long. The length of 60 feet is multiplied by four to get a final measurement of 240 feet. A rectangular region with an area of 1200 square feet will therefore have a different perimeter depending on its length, with a length of 40 feet resulting in a perimeter of 160 feet, a length of 50 feet resulting in a perimeter of 200 feet, and a length of 60 feet resulting in a perimeter of 240 feet.
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How many terms are there in the following expression:
-12x + 15y -17x + 16y
Answer:
4 terms
Step-by-step explanation:
-12x
15y
-17x
16y
Suppose a license plate must contain 3 letters followed by 4 digits. Letters and digits can be repeated. How many different license plates are possible that end with 5 as the last digit?
There are 17,576,000 possible license plates consisting of 3 letters followed by 4 digits.
Fundamental Counting Principles:
The fundamental counting principle is a rule used to count the total number of possible outcomes in a situation.
When something can be done m different ways and n different ways,
there are then [tex]m*n[/tex] ways to accomplish both.
Based on the given information, since the letters and digits may be repeated, there are:
26 ways to fill in the first letter
26 ways to fill in the second letter
26 ways to fill in the third letter
10 ways to fill in the first digit
10 ways to fill in the second digit
10 ways to fill in the third digit and
1 way to fill in the first digit (as the last digit end with 5)
Thus, by Fundamental Principle of Counting, there are 17,576,000 possible license plates.
26 x 26 x 26 x 10 x 10 x 10 x 1 = 17,576,000
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what is the probability that a randomly selected patient is admitted for something other than coronary care?
The probability that a randomly chosen patient will be admitted for a reason other than coronary care is equal to one less than the likelihood that they will be admitted for that reason.
The likelihood that a randomly chosen patient will be admitted for a reason other than coronary care is equal to 1 less than the likelihood that they will be admitted for that reason. For instance, if the chance of being admitted for coronary care is 0.25, the chance of being admitted for a different reason is 0.75. This is due to the requirement that the total number of outcomes must equal 1. Accordingly, if one outcome has a 0.25 probability, then the chance of every other outcome must equal 0.75. As a result, the likelihood that a randomly chosen patient will be admitted for a reason other than coronary care is equal to 1 minus the likelihood that they will be admitted for that reason.
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How many solutions does the system of equations have?
A. No solution
B. Four solutions
C. Exactly one solution
D. Infinitely many solutions
Answer:
C. Exactly one solution
Step-by-step explanation:
You want to know the number of solutions of the system of equations shown in the graph.
Point(s) of intersectionA solution to a system of equations is the set of points on a graph where all of the equations are satisfied simultaneously. For a system of two linear equations, it will be the point(s) where the lines intersect.
Here, the lines intersect at one point, so there is exactly one solution.
sally has 20 water bottles he gives 10 to jerry how many does sally have left?
If sally has 20 water bottles and then he gives 10 to jerry, the number of water bottles he have left is 10.
According to the question, it is given that :
Total number of water bottles sally had = 20 water bottles
Number of water bottles, Sally gives to jerry = 10 water bottles
Number of water bottles sally have left are
Total number of water bottles sally had - Number of water bottles sally gives to jerry
Number of water bottles sally have left = 20 - 10
Number of water bottles sally have left = 10 water bottles
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PLEASE HELP
X =
(15x - 30)°
T
Answer:
x=1°
Step-by-step explanation:
I gave my explanation in the previous question. Now, I can just solve:
(15x-30)°=45°
15x°=15°
x=1°
PLEASE MARK AS BRAINLIEST7. A portrait without its frame has
a height 1.5 times its width w,
in inches. Its frame is 4 in. wide
all along its perimeter. What is
an expression for the area of the
framed portrait in terms of w?
Simplify your expression and write
it in standard form.
The expression for the area of the framed portrait in terms of w is: A = [tex]1.5w^{2}[/tex] + 12w + 64.
How to simplify an expression?Simplifying an expression means to write it in its simplest form by combining like terms and removing any redundant or unnecessary elements. There are several techniques you can use to simplify expressions, including:
Combining like terms: Like terms are terms that have the same variable raised to the same power. For example, 2x and 4x are like terms. To simplify an expression, you can add or subtract like terms.
Distributing: Distributing means multiplying a constant or variable by each term within a set of parentheses. For example, if you have the expression 2(x + 3), you can distribute the 2 to each term within the parentheses: 2x + 6.
Factoring: Factoring means finding a common factor among a set of terms and grouping them together. For example, if you have the expression [tex]x^{2}[/tex] + 4x, you can factor out the x: x(x + 4).
Simplifying rational expressions: Rational expressions are expressions that have one fractional term. To simplify a rational expression, you can cancel out common factors in the numerator and denominator.
Let's call the width of the portrait w and the height h. We know that the height of the portrait is 1.5 times its width, so h = 1.5w.
The area of the portrait is the product of its width and height: A = w * h = w * 1.5w = [tex]1.5w^{2}[/tex].
The width of the frame is 4 inches all along its perimeter, so the total width of the framed portrait is w + 4 + 4 = w + 8.
The total height of the framed portrait is h + 4 + 4 = h + 8 = 1.5w + 8.
The area of the framed portrait is the product of its width and height: A = (w + 8) * (1.5w + 8) = (w + 8) * 1.5w + 8 * (w + 8) = 1.5w^2 + 12w + 64.
So, the expression for the area of the framed portrait in terms of w is: A = [tex]1.5w^{2}[/tex] + 12w + 64.
This expression is already in standard form.
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Are x and y common factors?
x and y are not common factors, as they cannot be simplified with themselves.
What are common factors?Common factors in an expression with n terms are the terms that are common to all the terms of an expression.
For example, taking the expression 2 + 4 + 6, we have that 2 is a common factor, as:
4 = 2 x 2.6 = 2 x 3.For variables to be common factors, we have that they must have the same base, with the same or different exponents.
x and y are different bases, hence they are not common factors.
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At a small high school, 5 students took Mrs. Jones's AP Statistics class last year. The student's names are Ashley, Brayden, Carmen, Dale, and Eve. Ashley, Brayden, and Carmen each got a 5 on the AP Statistics exam. Mrs. Jones would like to use the results of these 5 students to demonstrate how to create a sampling distribution of the sample proportion for simple random samples of size n = 2 for her current students. a) What is the value of p, the population proportion of students in Mrs. Jones's AP Statistics class who got a 5 on the AP Statistics exam? Explain. b) Using the table provided, list all 10 possible simple random samples of size n = 2, and for each sample calculate the sample proportion of students who got a 5 on the AP Statistics exam. The first one is completed for you. SRS n = 2 А, В P 1 c) Using the number line provided, create a dotplot to display the sampling distribution of p. d) is the sample proportion an unbiased estimator of the population proportion? Explain.
Answer:
Step-by-step explanation:
a) The value of p, the population proportion of students in Mrs. Jones's AP Statistics class who got a 5 on the AP Statistics exam, is 3/5. This is because out of the 5 students, 3 (Ashley, Brayden, and Carmen) got a 5 on the AP Statistics exam.
b) The 10 possible simple random samples of size n = 2 are:
Ashley, Brayden; P = 2/2 = 1
Ashley, Carmen; P = 2/2 = 1
Ashley, Dale; P = 1/2 = 0.5
Ashley, Eve; P = 1/2 = 0.5
Brayden, Carmen; P = 2/2 = 1
Brayden, Dale; P = 1/2 = 0.5
Brayden, Eve; P = 1/2 = 0.5
Carmen, Dale; P = 1/2 = 0.5
Carmen, Eve; P = 1/2 = 0.5
Dale, Eve; P = 0/2 = 0
c) To create the dotplot for the sampling distribution of p:
Label the number line with 0, 0.5, 1
For each sample proportion calculated, place a dot above the corresponding value on the number line
Repeat this process for all sample proportions
d) Yes, the sample proportion is an unbiased estimator of the population proportion. This means that on average, the sample proportion will equal the population proportion. In other words, the mean of the sampling distribution of the sample proportion will equal the population proportion.
A small tree was planted at a height of 5 feet. The tree has been planted for 15 months, and is now 42.5 feet tall. Which equation could be used to find x, the average number of feet the tree grew each month?
A.
15x + 5 = 42.5
B.
5x + 15 = 42.5
C.
15x + 42.5 = 5
D.
42.5x + 5 = 15
The equation that shows the height of the tree is 42.5 = 15x + 5
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables using mathematical operations. An equation can be linear, quadratic, cubic and so on, depending on the degree of the variable.
The slope intercept form of the linear equation is:
y = mx + b
where m is the slope and b is the initial value.
Let y represent the height of the small tree and x represent the average number of feet the tree grew each month. Hence:
A small tree was planted at a height of 5 feet. Hence, b = 5.
The tree has been planted for 15 months, and is now 42.5 feet tall. This makes:
42.5 = 15x + 5
The equation is 42.5 = 15x + 5
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Jimmy collected 100 pounds of aluminum cans to recycle.He plans to collect an additional 35 pounds each day. Write the equation for the total pounds,P, of aluminum cans after w weeks. What does the slope and y-intercept represent? How long will it take Rufus to collect 1000 pounds of cans?
9 A hollow metal tube is made using a 5 mm metal sheet. The tube is 35 cm long and has an exterior diameter of 104 cm.
a. Draw a rough sketch of the tube and add its dimensions
b.Write down all the calculations you will have to make to find the volume of metal in the tube.
C. Calculate the volume of metal in the tube. d How could you find the total surface area of the outside plus the inside of the tube?
On solving the provided question, we can say that value of the total surface area of the outside plus inside of the tube will be (1033+1143) = 2176 cubic cm
what is surface area ?An indication of the overall space occupied by an object's surface is its surface area. A three-dimensional shape's surface area is the total amount of space that surrounds it. A three-dimensional shape's entire surface area is known as its surface area. The surface area of a cuboid with six rectangular faces may be calculated by adding the areas of each face. As an alternative, you may use the formula below and name the box's dimensions as follows: Surface (SA) = 2lh + 2lw + 2hw. Surface area is a measurement of the entire amount of space filled by a three-dimensional shape's surface (a three-dimensional shape is a shape that has height, width, and depth).
Volume is 704cm3
Total Surface area is 2176
Cylinder volume is calculated as follows: cylinder volume = π * radius² * height.
Length of metallic tube, h = 35 c
Radius (R) = 5.2 cm
inner Radius (r) = 4.7cm
Volume of metal =
3.14*(27.04-22.09)*35
704 cm cubic
Surface area inside
2*22/7*4.7*35
1033 cubic cm
Surface area outside
2*22/7*5.3*35
1143 cubic cm
Value of the total surface area of the outside plus inside of the tube will be (1033+1143) = 2176 cubic cm
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Big ideas math 7.4.
Based on the properties of a rhombus, the measure of each numbered angle is:
m<1 = 36°
m<2 = 72°
m<3 = 72°
m<4 = 72°
m<5 = 36°
What are the Properties of a Rhombus?The two set of opposite sides of a rhombus are parallel to each other.Opposite angles have the same measure.The diagonals bisect each of the angles.Using the properties mentioned above, we can solve for the numbered angles as explained below:
ED and FG are parallel, therefore, m<3 = 72° (alternate interior angles)
m<4 = 72° [bisected angles of a rhombus by the diagonal]
m<2 = m<4 (alternate interior angles)
m<2 = 72°
m<1 = 180 - m<2 + 72 [sum of a triangle]
Substitute:
m<1 = 180 - 72 + 72
m<1 = 36°
m<5 = m<1 [opposite angles are equal in a rhombus]
m<5 = 36°
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william has a 26 2626-liter glass tank. first, he wants to put some marbles in it, all of the same volume. then, he wants to fill the tank with water until it's completely full. if he uses 85 8585 marbles, he will have to add 20.9 20.920, point, 9 liters of water. what is the volume of each marble?
The volume of each marble in a 26 liter glass tank is 12.
The tank's volume is listed as 26.
The tank requires 20.9 liters of water to fill when 85 marbles are placed inside.
So the volume of 85 marble
= 26-20.9 = 5.1
So, volume of each marble
= 5.1/85 = 0.06
Therefore, the volume that will be covered if William wishes to use 200 marbles is:
200*0.6 = 12
Therefore, the volume of marbles in a 26 litre tank is equal to 12
Water will therefore be needed to fill the tank.
= 26 - 12 = 14
Therefore, The volume of each marble in a 26 liter glass tank is 12.
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Complete question:
William has a 26-liter glass tank. First, he wants to put some marbles in it, all of the same volume. Then, he wants to fill the tank with water until it's completely full. If he uses 85 marbles, he will have to add 20.9 liters of water. What is the volume of each marble? How much water is necessary if William uses 200 marbles?
if you draw five cards at random from a standard deck of 52 cards, what is the probability that there are at least 4 distinct characters (letters or numbers)?
If you draw five cards at random from a standard deck of 52 cards, the probability that there are at least 4 distinct characters (letters or numbers) is 0.8406.
This probability is calculated using the combination formula. The formula states that the number of possible outcomes when selecting r items from a set of n is equal to n!/(r! (n-r)!). consider a deck of 52 cards, each with a unique letter or number. When selecting 5 cards at random, the probability of there being at least 4 distinct characters is the same as the probability of there being exactly 4 distinct characters.
This is because if there are 4 distinct characters, there must be a fifth card with a character that has already been drawn. Therefore, the probability of there being at least 4 distinct characters is the same as the probability of there being exactly 4 distinct characters. Since there are 52 possible characters and we are selecting 5 cards, the probability can be calculated using the combination formula and is equal to 0.8406.
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Maria and Gabriella each improved their yards by planting grass sod and geraniums. They bought their supplies from the same store. Maria spent $114 on 10 ft² of grass sod and 9 geraniums. Gabriella spent $90 on 5 ft² of grass sod and 10 geraniums. What is the cost of one ft² of grass sod and the cost of one geranium?
Maria and Gabriella each improved their yards by planting grass sod and geraniums. They bought their supplies from the same store. Maria spent $114 on 10 ft² of grass sod and 9 geraniums. Gabriella spent $90 on 5 ft² of grass sod and 10 geraniums. What is the cost of one ft² of grass sod and the cost of one geranium?
Answer:
$11/ft^2 of grass, $12/geranium
Step-by-step explanation:
In this number sentence, both triangles represent the same number. 32 - (triangle) = (triangle) - 8. What number do the triangles represent?
Answer:
Δ = 20
Step-by-step explanation:
let triangle be Δ , then
32 - Δ = Δ - 8 ( subtract 32 from both sides )
- Δ = Δ - 40 ( subtract Δ from both sides )
- 2Δ = - 40 ( divide both sides by 2 )
Δ = 20
Which scatter plot represents the data shown in the table?
The diagram of the scatter plot is given in the attached image below.
What is a linear function?The graph of a linear function is a straight line. The following is the form of a linear function.
a + bx = y = f(x).
One independent variable and one dependent variable make up a linear function. x and y are the independent and dependent variables, respectively.
The data are shown in the table below:
x y
4 1
5.5 2
7.5 3
9 4
11 5
14 6
From the given choices:
the last diagram of the scatter plot is given in the attached image.
Hence, the scatter plot is given below.
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The height of a ramp, y, is proportional to the
horizontal distance along the ramp, x. Both
lengths are measured in feet. The equation
that relates the two is:
y=1/4x
Produce a graph of this relationship on the grid
provided. Explain how you made your graph.
This line represents the proportional relationship between x and y, as described by the given equation.
What is Equation?An equation is a physical and mathematical statement the describing physical phenomen or describe the relationship between different physical quantities. It typically consist of two or more variables which are symbol representing physical quantities and an equal sign the variable may be quantities such as force velocity your energy and the question describe how this quantities relate to each other.
To graph this relationship, I first plotted the origin (0,0) on the grid. Then, I made a table of values for x and y, using the given equation. I placed x values from 0 to 10 on the x-axis and the corresponding y values from 0 to 2.5 on the y-axis. Finally, I plotted each point on the graph to create a straight line. This line represents the proportional relationship between x and y, as described by the given equation.
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Use the information given to answer the question.
One U.S. dollar is equivalent to about 6 Chinese yuan.
One U.S. dollar is equivalent to about 334 Saudi riyal.
Danny has 48 yuan and 84 riyal. What is the equivalent value of this money in U.S. dollars?
Answer:
I'm not sure but it might be 8 42/167
Step-by-step explanation:
Solve the equation. n/-1.5 = -1.2 N=?
Answer:
1.8
Step-by-step explanation:
The equation we are given is [tex]\frac{n}{-1.5} = -1.2[/tex]. We can multiply both sides by -1.5 to get n = 1.8.
Answer:
N = 1.8
Step-by-step explanation:
You do cross multiplication
n*1 = -1.5 * -1.2
1n = 1.8
To check it, we plug in 1.8
1.8/-1.5 = -1.2
Multiply. Write your answer as a fraction in simplest form. 4x 4/15
Answer:
1 1/15
Step-by-step explanation:
4 x 4/15 = 4/1 x 4/15 = 16/15 = 1 1/15
true or false? z-score helps to determine how far a particular value is from the mean relative to the data setâs standard deviation.
Answer:
True
Step-by-step explanation:
True. A z-score, also known as a standard score, is a statistical measure that helps to determine how far a particular value is from the mean relative to the data set's standard deviation.
A z-score is a dimensionless quantity that expresses the distance between a particular value and the mean of a distribution in terms of the number of standard deviations that the value is from the mean. A positive z-score indicates that the value is above the mean, while a negative z-score indicates that the value is below the mean.
To calculate the z-score for a given value, the formula is: z = (x - μ) / σ where z is the z-score, x is the value being considered, μ is the mean of the data set, and σ is the standard deviation of the data set.
For example, if the mean of a data set is 50 and the standard deviation is 10, and we are interested in finding the z-score for a value of 65, the calculation would be: z = (65 - 50) / 10 = 1.5. This indicates that the value of 65 is 1.5 standard deviations above the mean of the data set.
Z-scores are useful for comparing values across different data sets or for identifying extreme values in a data set. Values with high positive or negative z-scores are typically considered to be outliers, indicating that they are further from the mean than most other values in the data set.
In summary, the statement "z-score helps to determine how far a particular value is from the mean relative to the data set's standard deviation" is true. Z-scores are a statistical measure that help to express the distance between a particular value and the mean of a distribution in terms of the number of standard deviations that the value is from the mean.
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A concrete block has a volume of 48 cubic meters and the dimensions show. Find the value of x.
Write the augmented matrix for the following system of equations 7-6y+8x=0, 6x=-3-2y
The augmented matrix for the system of equations 7-6y+8x=0, 6x=-3-2y is:
| 7 -6 8 | 0 |
| 6 0 -2 | 3 |
This matrix represents the system of equations in a matrix form where the coefficients of the variables are on the left and the constant terms are on the right.
An augmented matrix is a rectangular array that is formed by appending the coefficients of variables and the constant terms of a system of linear equations in a single matrix. It is used as a tool in linear algebra to represent a system of linear equations in a compact form.
The augmented matrix is typically written as:
| a11 a12 a13 | b1 |
| a21 a22 a23 | b2 |
| a31 a32 a33 | b3 |
where aij represents the coefficient of the i-th equation for the j-th variable, and bi represents the constant term for the i-th equation.
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help please xxxxxxxxxxxx
Factorize 4x^4 – 20x^2 + 25 using the Perfect Square Method
Answer:
see below
Step-by-step explanation:
4x^4 – 20x^2 + 25
= (2x-5)²
so the factor is 2x-5
Actors competing in a 42 mile bicycle race he’s already completed 18 miles of the racing is traveling at a constant speed of 12 mph when one starts the race what is traveling at a constant speed for 16 mph. Our constant speed could want to travel to catch up with Hector at the finish line explain.
In 4 hours, and 30 minutes (or 4.5 hours), Wanda will catch up to the hector.
What are mathematical operations?The term "operation" in mathematics refers to the process of computing a value utilizing operands and a math operator. For the specified operands or integers, the math operator's symbol has predetermined rules that must be followed. In mathematics, there are five basic operations: addition, subtraction, multiplication, division, and modular forms.
Given, Hector competing in a 42-mile bicycle race he’s already completed 18 miles of the racing and is traveling at a constant speed of 12 mph.
Let x = the hours needed for Wanda to catch up to Hector.
Hector has already completed 18 miles. Hector travels at 12 miles per hour.
After x more hours, Hector will travel
18 + 12x miles
Wanda travels at 16 miles per hour. In x hours, she travels
16x miles
If Wanda catches up to Hector, then
16x = 18 + 12x
4x = 18
x = 4.5 hours
Therefore, Wanda will catch up to the hector at 4 hours, 30 minutes (or 4.5 hours).
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Complete question: