The expression represents a quadratic polynomial.
The constant term is 1.
The leading term is -x².
The coefficient of the leading term is -1.
What is a polynomial?
A polynomial is a mathematical expression made up of coefficients and indeterminates that uses only the operations addition, subtraction, multiplication, and powers of positive integers of the variables.
Given expression is -x² + 1
The variable of the expression is x.
The constant term is 1.
Leading term: The highest power of the variable that occurs in the polynomial is its degree. The term with the highest degree—i.e., the term with the highest power of the variable—is the leading term. The leading coefficient is the leading term's coefficient.
The leading term of the expression is -x² .
The coefficient of -x² is -1.
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Jessica and Sam are growing plants for a science experiment. Sam put .89 liters of water in his plant each day. Jessica put .87 liters of water in her plant each day. Sam's plant grew 2.35 feet while Jessica's plant grew 2.32 feet.
Who used more water?
Who's plant grew the least
The person who used more water was Sam and the person who's plant grew the least was Jessica.
What happened to the plants?The person who used more water in watering their plants is the person who used the most liters of water when they watered their plants. This person is Sam, who used 0. 89 liters of water on his plants every day.
Jessica on the other hand, water less at 0. 87 liters per day. As a result, Sam's plants grew the most was they grew 2. 35 feet, while Jessica's plants grew 2. 32 feet.
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Each side of the base of a square pyramid measures 10 inches. The height of each lateral face of the pyramid is also 10 inches.
What is the surface area of the pyramid?
Enter your answer in the box.
The lateral surface area of the pyramid is 200 square inches.
What is a pyramid?A three-dimensional figure is a pyramid. Its base is a flat polygon. The remaining faces are all triangles and are referred to as lateral faces. The number of sides on its base is equal to the number of lateral faces. The line segments that two faces intersect to form its edges. The intersection of three or more edges forms a vertex.
We know the lateral surface area of a pyramid is = (1/2)×P×h, where P is the perimeter of the base.
Given, Each side of the base of a square pyramid measures 10 inches.
So, The perimeter of the pyramid is 4×10 = 40 inches.
Therefore, The lateral surface area of the pyramid is = (1/2)×40×10.
= 200 square inches.
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Which step can be performed to find the volume of a cone with the same radius and
height as the cylinder?
divide the volume of the cylinder by x
divide the volume of the cylinder by 3
divide the volume of the cylinder by the height
divide the volume of the cylinder by the radius
The volume of cone is gotten by dividing the volume of cylinder by 3.
What is an equation?An equation is an expression showing the relationship between two or more numbers and variables. An equation can either be linear, quadratic, cubic and so on depending on the degree.
The volume of a solid figure is the amount of space it occupies in three dimension.
The volume of a cylinder = π * radius² * height
The volume of a cone = (1/3) * π * radius² * height
Hence:
If the cone and cylinder have the same radius and height:
Volume of cone = (1/3) * volume of cylinder.
The volume of cone is one-third volume of cylinder.
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Find the sum of 109+643 then use estimation to see if your answer is reasonable
Answer:
800
Step-by-step explanation:
I am not so sure because you didn't explain the question well
Based on the table below after completing it for 30 u.s. dollars gets__British pounds
The value of 30 dollars in British pounds is 24.3
What is Unit of Measurement?A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
We have to convert the 30 us dollars to the British pounds
The value of one dollar in pounds is 0.81
Now let us calculate for 30 dollars
30×0.81
24.3 pounds
Hence, the value of 30 dollars in British pounds is 24.3
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In a survey of 1,600 people who owned a certain type of car, 880 said they would buy that car again. What percent surveyed were satisfied with the car?
The percent of people satisfied with the survey is 55%
What is percentage?A percentage is a number or ratio that can be expressed as a fraction of 100.
Given that, in a survey of 1,600 people who owned a certain type of car, 880 said they would buy that type of car again, we need to find what percent of the people surveyed were satisfied with the car,
The percent of people satisfied with the survey = 880 / 1600 × 100
= 55%
Hence, the percent of people satisfied with the survey is 55%
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Which of the following tables represents a linear relationship that is also proportional? x −1 0 1 y −4 −2 0 x −1 0 1 y −2 0 2 x −1 0 1 y 0 1 2 x −1 0 1 y 1 3 5
The x = -1, 0, 1 and y = 1, 3, 5 represents a linear relationship that is also proportional.
What is linear relationship?
Linear relationship is a statistical term used to describe a straight-line relationship between two variables.
A relationship is proportional if there is a constant of proportionality (k) such that for any x and y in the relationship, y = kx.
The table x = -1, 0, 1 and y = 1, 3, 5 represents a linear relationship that is proportional because we can see that for every increase in x by 1 unit, y increases by 2 units (the constant of proportionality).
This is a linear relationship because the values of x and y change in a consistent straight-line pattern.
Therefore, x = -1, 0, 1 and y = 1, 3, 5 represents a linear relationship that is also proportional.
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Answer:
A is the answer
Step-by-step explanation:
A quiz consists of 20 multiple-choice questions, each with 4 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 70 %.
The probability of passing if the minimum passing grade is 70 %
is 0.3074.
What is probability?Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event.
here, we have,
A quiz consists of 20 multiple-choice questions, each with 4 possible answers.
now,
n = 20, the number of questions
p = 1/4= 0.25, the probability of making a correct guess
q = 1 - p = 0.75, the probability of making an incorrect guess.
Expected success = 70% or 7 of 10.
From the binomial distribution,
P(7of 10) = ₁₀C7 p^7q^3
=120×0.000061×0.42
=0.3074
Hence, the Answer: 0.3074.
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A student is graduating from college in one year but will need a loan in the amount of $4,980 for the last two semesters. The student may receive either an unsubsidized Stafford Loan or a PLUS Loan. The terms of each loan are:
Unsubsidized Stafford Loan: annual interest rate of 6.25%, compounded monthly and a payment grace period of six months from time of graduation
PLUS loan: annual interest rate of 7.25%, compounded monthly, with a balance of $5,353.29 at graduation
Which loan will have a higher balance and by how much at the time of repayment?
The Stafford loan will have a higher balance by $114.84 at the time of repayment.
The PLUS loan will have a higher balance by $114.84 at the time of repayment.
The Stafford loan will have a higher balance by $52.97 at the time of repayment.
The PLUS loan will have a higher balance by $52.97 at the time of repayment.
The Stafford loan will have a higher balance of $114.84 at the time of repayment.
What is compound interest?Borrowers are required to pay interest on interest in addition to principal since compound interest accrues and is added to the accrued interest from prior periods.
We know the formula for compound interest is,
A = P(1 + r/100)ⁿ.
Where, A = amount, P = principle, r = rate, and n = time in years.
The formula for compound interest compounded monthly is
A = P(1 + (r/12)/100)¹²ⁿ.
So, For Unsubsidized Stafford Loan,
A = 4980(1 + (6.25)/12/100)¹⁸. (12 times 1.5 years two semesters and 6
months)
A = 4980(1 + 0.0052)¹⁸.
A = 4980(1.0052)¹⁸.
A = $5467.
So, Unsubsidized Stafford Loan will give a higher balance.
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Answer: The Stafford loan will have a higher balance by $114.84 at the time of repayment.
Step-by-step explanation:
Subtract 4x + 6 from 7 + 2x?
Answer:
1-2x
Step-by-step explanation:
[tex](7+2x)-(4x+6)=7+2x-4x-6=1-2x[/tex]
StartFraction 32 Over 8 EndFraction = StartFraction 28 Over x EndFraction
a.
x = 4
c.
x = 8
b.
x = 28
d.
x = 7
Answer:
d. x = 7
Step-by-step explanation:
[tex]\frac{32}{8} = \frac{28}{x}[/tex]
Cross multiply, the denominator "8" is multiplied by numerator "28", while the numerator "32" is multiplied by denominator "x":
8 * 28 = 224
32 * x = 32x
[tex]32x = 224[/tex]
Divide both sides by 32:
[tex]\frac{32}{32} = \frac{224}{32}[/tex]
[x = 7]
What is the slope of the line passing through the points (-3, 4) and (4, - 1)?
Answer:
The slope of the line is -5/7
Step-by-step explanation:
[tex]\displaystyle m=\frac{y_2-y_1}{x_2-x_1}=\frac{-1-4}{4-(-3)}=\frac{-5}{4+3}=-\frac{5}{7}[/tex]
What is the quotient
3.60/1.80
Answer:
2
Step-by-step explanation:
3.6 / 1.8 = 2.
Answer:
The answer is 2
Step-by-step explanation:
Three friends got the prize money worth 120000 The first friend would get three times the amount of the third friends portion. The third friend would get twice the amount of the second friends portion. Determine the amount that each friend would receive.
Answer: 1st friend = 13333 x 6
2nd friend = 13333 x 2
3rd friend = 13333
(this is rounded off the actual amount of 1 unit is 13333.3333333)
Step-by-step explanation:
1st friend = 6 units
2nd friend =2 units
3rd friend =1 unit
6+2+1 = 9
120000 divided 9 = 13333
1st friend = 13333 x 6
2nd friend = 13333 x 2
3rd friend = 13333
A child enters a carousel that takes one minute to revolve once around. The child enters at the point (0,1)
, that is, on the due north position. Assume the carousel revolves counterclockwise.
What are the coordinates of the child after 90
seconds?
The child's position after 90 seconds would be (0, -1).
How to find the child's positionThe carousel revolves 360 degrees in one minute, which means it revolves 360/60 = 6 degrees per second.
After 90 seconds, the carousel would have revolved 90 * 6 = 540 degrees.
When the carousel revolves counterclockwise, the point (0, 1) would rotate to a new position by 540 degrees.
To find the new position, we can use the transformation:
540 - 360 = 180
hence the transformation is 180 degrees which is reflection across x axis
The rule for a reflection over the x -axis is (x, y) → (x, −y)
point (0, 1) → (0, −1)
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find the eroorrrrrr
help me asap
We are given two triangles ABC and DEF... it is given that they are similar and we know that when 2 triangles are similar the ratio of their corresponding sides are equal... Here, the corresponding sides are AB/DE and BC/EF but maryam has taken the wrong ratio.. Maryam has taken AB/EF and BC/DE...
Lets solve it:AB/DE = BC/EF
AB = xDE = 18BC = 16EF = 12x/18 = 16/12
x/18 = 4/3
Cross multiply3x = 72
x = 24m
I need help please. Greatly appreciated.
The correct statement regarding the solution to the equation 1/6(3x - 6) = 1/8(4x + 8) is given as follows:
Solving results in the statement -1 = 1, which is false. There is no solution.
How to solve the equation?The equation for this problem is given as follows:
1/6(3x - 6) = 1/8(4x + 8)
Applying the distributive property to each side of the equality, we have that:
0.5x - 1 = 0.5x + 1
Isolating the variable x, we have that:
0.5x - 0.5x = 1 + 1
0x = 2.
x = 2/0.
A division by zero is a false statement, hence the equation has no solution.
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The town of Cary, NC uses a piecewise function to determine the monthly water charge for a consumer. Let W
represent the cost of water and g the number of gallons, in thousands, used by the consumer. The model for the
monthly water bill is:
W(g)=
3.28g +2.76 if 0≤g≤5
3.75(g-5)+19.16 if 5
5.33(g-8)+30.41 if g>8
a) find W(3.5) and explain what these values represent.
b) A consumer used 8200 gallons of water in one month. Use function notation to represent the cost of water for the consumer.
c) how many gallons of water were used if the customer’s water bill was $24.79?
d) find the domain the range of the function.
e) explain in the context of the problem which piece of the function represents.
If the customer's water bill was $24.79, 4500 gallons of water were used by the general public as a result.
what is function ?Quantity and their permutations, theorems and surrounding structures, figures and their locales, and venues where they can found are all parts of the mathematics course of study. The interaction of both a group of values, each of which produce a collective agreements, is referred to as a "function." A utility is a linkage between and outputs where each input produces a single, unique result. Every action has a region but a codomain, often termed as a scope. F is frequently utilised denote formulas (x). An x is the input. In light of the following criteria, there are four primary categories of functions that are available: on functions, yet another functions, so several operations, within functions, and then on functions.
given
(A) given that 7.5 falls between 5 and 8,
As a result, in order to determine C(7.5), we must utilize the definition of C(g) for 5 g 8
Considering that C(g) = 3.75(g - 5) + 19.16, 5 g > 8
calculating g = 7.5
C(7.5) = 3.75(7.5 – 5) + 19.16 = 28.535
Water usage is represented by g, and C(g) provides the cost (before taxes) for that.
In other words, the cost to the citizen before taxes for 7500 gallons of water use will be 28.535.
(B) We must apply the definition of C(g) for g > 8 because 8.2 > 8.
C(g) = 5.33(g – 8) + 30.14, g > 8
So, C(8.2) = 31.206
C(g) = $17.52
C(g) has a value of 19.16 30.14.
If the customer's water bill was $24.79, 4500 gallons of water were used by the general public as a result.
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(3a-3/4) times 1/3 if a is 3/8
Answer:
15/24
Step-by-step explanation:
(3a-3/4)
where a is 3/8,
we substitute the value of a;
(3(3/8)-3/4)
(9/8-3/4) =15/8
15/8 times 1/3 =15/24.
I need a answer with solution need help please
The differentiation of the equation will be (dy/dx) = - x² / y². Then the correct option is D.
What is differentiation?The rate of change of a function with respect to the variable is called differentiation. It can be increasing or decreasing.
The equation is given below.
x³ + y³ = 1
Differentiate the equation with respect to 'x'. Then we have
(d/dx) (x³ + y³) = d/dx (1)
3x² + 3y² (dy/dx) = 0
x² + y² (dy/dx) = 0
y² (dy/dx) = - x²
(dy/dx) = - x² / y²
The differentiation of the equation will be (dy/dx) = - x² / y². Then the correct option is D.
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Part 1: Find the value of x.
Part 2: Find the measure for each angle.
1) The value of x in the triangle is; x = 25
2) The measure of each interior angle is;
25°, 40° and 115°
Exterior angle = 65°
How to find the missing angle in a triangle?In a triangle, from the exterior angle property, we know that the exterior angle is always equal to the sum of the interior opposite angles. Thus, we say that any two triangles will be similar provided that their corresponding angles tend to be congruent and the length of their sides will be proportional.
Thus;
x + 15 + 25 = 3x - 10
3x - x = 25 + 15 + 10
2x = 50
x = 50/2
x = 25
The measure of each interior angle is;
25°
25 + 15 = 40°
180 - (25 + 40) = 115°
Exterior angle = 180 - 115 = 65°
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At a community barbecue, Mrs. Garcia and Mr. Clayton are buying dinner for their families. Mrs. Garcia purchases 2 hot dog meals and 1 hamburger meal, paying a total of $18. Mr. Clayton buys 3 hot dog meals and 3 hamburger meals, spending $42 in all. How much do the meals cost?
The cost of the hot dog and hamburger meals, given the amount bought by Mrs. Garcia and Mr. Clayton, are :
Hamburger meal = $ 10Hot dog meal = $ 4How to find the cost ?From Mrs. Garcia's purchase, we have:
2x + y = 18
And from Mr. Clayton's purchase, we have:
3x + 3y = 42
Use the substitution method to come up with the formula:
3x + 3(18 - 2x) = 42
-3x + 54 = 42
x = $ 4
Hamburgers would then cost:
2x + y = 18
2 ( 4 ) + y = 18
y = $ 10
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If ZACD and ZABF are corresponding angles formed by parallel lines and
m/ACD=79°, what is m/ABF?
OA. 259°
OB. 11°
O C. 101°
O D. 79°
The measure of the angle mABF found using the corresponding angles theorem is mABC = 79°
What are corresponding angles?Corresponding angles are angles that formed by a transversal and parallel lines, which are located in the same relative positions, with regards to the transversal and the parallel lines.
The specified information are;
Angle ∠ACD and angle ∠ABF are corresponding angles formed by a common transversal and two parallel lines.
The measure ∠ACD = 79°
According to the corresponding angles theorem, the corresponding angles formed by two parallel lines, and their common transversal are congruent, therefore;
∠ACD ≅ ∠ABF
The definition of congruency indicates that we get;
m∠ACD = m∠ABF
The substitution property of equality indicates that we get;
m∠ACD = 79° = m∠ABF
m∠ABF = 79°
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Maeve currently has $130 and plans to earn more money each of the 8 weekends this summer. She wants at least $1,250 by the end of the summer. How much does she need to earn each weekend? Assume she earns the same amount each weekend. Solve her problem, and then graph the solution on a number line.
1) Maeve needs to earn $140 each weekend to get at least $1,250, using a linear inequality.
2) The graph on a number line that solves her problem is number line D, showing Maaeve's earnings per weekend.
What is a linear inequality?A linear inequality is a first-order term inequality that compares two values by the inequality symbols such as, '<', '>', '≤', '≠' or '≥'
In a linear inequality, m is the slope and b is the y-intercept with the x-intercept.
The amount Maeve currently has = $130
The number of weekends for the summer = 8
The least amount she wants to earn ≥ $1,250
Linear Inequality:130 + 8x ≥ 1,250
8x ≥ 1,250 130
8x ≥ 1,120
x ≥ 140
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Economics and Science Exercise 3.4 1. The cost, in dollars, to produce x litres of maple syrup for the Elmira Maple Syrup Festival is C(x) 75(√x - 10), where x ≥ 400. = a. What is the average cost of producing 625 L? b. The marginal cost is C'(x), and the marginal revenue is R'(x). Marginal cost at x litres is the expected change in cost if we were to produce one additional litre of syrup. Similarly for marginal revenue. What is the marginal cost at 1225 L? c. How much production is needed to achieve a marginal cost of $0.50/L?
The production level that achieves a marginal cost of $0.50/L is 1875 litres.
How find the marginal cost?To find the average cost of producing 625 L of maple syrup, we need to find the total cost of producing that amount, and then divide by the number of litres. The total cost can be found using the cost function:
C(x) = 75(√x - 10)
C(625) = 75(√625 - 10) = 75(25 - 10) = 75(15) = 1125
The average cost per litre is the total cost divided by the number of litres:
Average cost = Total cost / Number of litres = 1125 / 625 = 1.8
b. The marginal cost is the derivative of the cost function:
C'(x) = 75(1/(2√x))
C'(1225) = 75(1/(2√1225)) = 75(1/(35)) = 75/35 = 2.14
c. To find the production level at which the marginal cost is $0.50/L, we set the derivative equal to 0.50 and solve for x:
0.50 = 75(1/(2√x))
0.50 * 2√x / 75 = 1
√x = 75 / (2 * 0.50)
x = (75 / (2 * 0.50))^2
x = 1875
So the production level that achieves a marginal cost of $0.50/L is 1875 litres.
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6-31. MATH TALK
Read the Math Notes box in this lesson to review commonly used algebra vocabulary. Then consider
the expression below as you answer the following questions. Homework Help
3x²+7-2(4x + 1)
a. Name a constant.
b. What are the two factors in 2(4x + 1)?
What are the two factors in 4x?
and
c. Write an expression with a variable m, a coefficient -3, and a constant of 17.
d. Use the words coefficient, constant, term, expression, variable, and factor to describe 4x²+ 11y
-37. Coefficient:
Term:
and
Variables:
Constant:
expression:
e. Use the words factor, product, quotient, and sum to describe the parts of m-2-8(m+n)
Factors:
Quotient:
Product:
Sum:
a. [tex]7[/tex]
b. [tex]2[/tex] and [tex]4x+1[/tex]; [tex]4[/tex] and [tex]x[/tex]
c. [tex]-3m+17[/tex]
d. Coefficient: [tex]4[/tex], [tex]11[/tex]; Term: [tex]4x^2, 11y, -37[/tex]; Constant: [tex]-37[/tex]; Variables: [tex]x, y[/tex]; Expression: [tex]4x^2 +11y-37[/tex]
e. Factors: [tex]-8, (m+n)[/tex]; Quotient: [tex]\frac{5-m}{n}[/tex]; Sum: [tex]m+n[/tex]; Product: [tex]8(m+n)[/tex]
A constant in the expression 3x²+7-2(4x + 1) is 7. The factors in 2(4x + 1) are 2 and (4x + 1), and the factors in 4x are 4 and x. An expression with a variable m, a coefficient -3, and a constant of 17 can be written as -3m + 17. In the expression 4x² + 11y - 37, the coefficient is 4, the term, expression, and the variables are defined, but there are no factors. In the expression m-2-8(m+n), m is a factor, 2 and 8 are factors, the quotient is (m + n), and the sum is (m - 2 - 8(m + n)).
Explanation:a. A constant is a term that does not contain any variables. In the given expression, 7 is a constant.
b. The two factors in 2(4x + 1) are 2 and (4x + 1). In the expression 4x, the two factors are 4 and x.
c. An expression with a variable m, a coefficient -3, and a constant of 17 can be written as -3m + 17.
d. In the expression 4x² + 11y - 37, the coefficient is 4, the terms are 4x², 11y, and -37, there are two variables (x and y), and there are no factors.
e. In the expression m - 2 - 8(m + n), m is a factor, 2 and 8 are factors, the quotient is (m + n), and the sum is (m - 2 - 8(m + n)).
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The number 0.000 000 000 034 2 is equivalent to which of the following
expressions?
A. 3.42 x 10^-18
B. 3.42 x 10^-11
C. 3.42 x 10^-10
D. 3.42 x 10^11
E. 3.42 x 10^13
Answer: 3.42x10^11
Step-by-step explanation:
The number 0.0000000000342 is equivalent to 3.42 × 10^-11. Hence, option B is the correct answer.
This type of conversion is called scientific notation.
Firstly we have to place a decimal between the two non-zero numbers which is 3.42.
And then, count the number of decimals that were moved. That is 11.
And then, determine whether the decimal point is to be moved to the left or right to return to the original number. If the decimal is moved right then the exponent is negative. If the decimal is moved left then the exponent is positive.
Here, the exponent is moved right and the decimal will be negative.
In this case, it is written as 3.42 × 10^-11.
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Part 1: For each compound figure,
a. Find the perimeter
b. Find the area
16 yd
32 yd
16 yd
8 yd
a. Perimeter = 72 yd
b. Area = 640 yd².
Calculate the area and perimeter for compound figure?a. To find the perimeter of the compound figure, we need to add the lengths of all four sides together.
The perimeter is equal to 16 yd + 32 yd + 16 yd + 8 yd = 72 yd.
b. To find the area of the compound figure, we need to separate the figure into two separate shapes and find the area of each.
The figure can be separated into a 16 yd by 32 yd rectangle and a 8 yd by 16 yd rectangle.
The area of the 16 yd by 32 yd rectangle is 16 yd x 32 yd = 512 yd² and the area of the 8 yd by 16 yd rectangle is 8 yd x 16 yd = 128 yd². The total area is 512 yd² + 128 yd² = 640 yd².
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A hiker wants to determine the height of a tree. She measures the tree's shadow to be 25.3 meters long. Her own shadow at the same time is 2.2 meters long. If the hiker is 1.9 meters tall, how tall is the tree?
The height of the tree given the ratio of the hikers shadow to the tree's shadow is 21.85 meters
What is the height of the tree?Tree's shadow = 25.3 meters
Hikers shadow= 2.2 meters
Tree's height= x
Hiker's height= 1.9 meters
Equate the ratio of tree's to hikers
25.3 : 2.2 = x : 1.9
25.3/2.2 = x / 1.9
cross product
25.3 × 1.9 = x × 2.2
48.07 = 2.2x
divide both sides by 2.2
x = 48.07 / 2.2
x = 21.85 meters
Ultimately, the tree's height is given by 21.85 meters
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What numbers round down when rounding to the nearest thousand? 95,100, 72,681, 84,279, 10,872, 199,999, or 7,115?