which expression is equivalent to 4/5a + 2/3b + 1/8 - 7/6b - 3/4 - 2/5a

Answer:

-4

Why? I subtract the numbers. How to do that is by looking at the table. You always use two ordered pairs. Let's choose (-3,12) and (-2,8).

Step 1: Choose two ordered pairs (you can choose any two, it doesn't matter).

Now, subtract the y's together and subtract that x's together. So, what is 12-8? That's obvious, it's 4. Alright, how about -3-(-2)? Well, two negatives make a positive, so the problem is actually -3+2. So, what's that? Correct, -1. And, since slope is y/x, the answer would be -4/1, or -4.

The ratio of the number of astronauts on Earth to the total number of astronauts is 7 : 30.

A ratio is a mathematical expression that compares two or more values by dividing the size of one value by the size of another.

Ratios can be expressed in several different forms, including fractions, decimals, or percentages, and can be used to compare quantities, measurements, or other values in a meaningful way.

Ratios provide a way to express the relationship between two or more values in a compact and concise format, and can be used in a variety of fields, including mathematics, science, finance, and engineering.

If the space program has 23 astronauts in outer space and 7 astronauts on Earth, then the ratio of the number of astronauts on Earth to the total number of astronauts is:

7 : (23 + 7) = 7 : 30

You can simplify the ratio to 7/30 or approximately 0.23 or 23%.

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Answer: No Solution

Step-by-step explanation: When you use the elimination method on second equation by multiplying it by 2 you get two equations that add up to a different solution. Since the variable coefficients are the same on both, there will be no solution.

The average rate of change of the function over the interval -2 ≤ x ≤ 4 is given as follows:

4.

The average rate of change of a function is given by the change in the output divided by the change in the input.

The two points in this problem are given as follows:

(-2, -3) and (4,21).

Hence the change in the output is of:

21 - (-3) = 24.

The change in the input is of:

4 - (-2) = 6.

Hence the rate is of:

24/6 = 4.

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The statement that best describes the area of the triangle is:

It is one-half the area of a square of side length 4 units.

Option B is the correct answer.

It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.

We have,

Triangle:

The base is 4 units, and the height is 4 units.

Area of the triangle.

= 1/2 x base x height

= 1/2 x 4 x 4

= 8 units²

Now,

a)

It is one-half the area of a rectangle of length 4 units and width 2 units.

This is not possible since we do not have 2 units.

b)

It is one-half the area of a square of side length 4 units.

Area of a square.

= Side²

= 4²

= 16 units²

So,

1/2x 16 = 8 units²

This is true.

c)

It is twice the area of a rectangle of length 4 units and width 2 units.

This is not possible since we do not have 2 units.

d)

It is twice the area of a square of the side length of 4 units.

This is not possible.

Thus,

It is one-half the area of a square of side length 4 units.

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The correct answer for the measures of the sides of the triangle is (D) 8 cm, 10 cm, and 4√41 cm.

The sine of an angle is a mathematical function that describes the relationship between the lengths of the sides of a right triangle and the angles within that triangle. In a right triangle, the sine of an angle is defined as the ratio of the length of the side opposite the angle to the length of the hypotenuse.

Let's call the side opposite the angle with sine 4.5 "a", and the side adjacent to that angle "b". Using the definition of sine, we can write the following equation:

sin(θ) = a/c

where c is the length of the hypotenuse. We can substitute 4.5 for the sine:

4.5 = a/c

Cross multiplying, we get:

4.5c = a

So, given the length of c, we can find a.

The only option that gives a positive value for c is (D), with c = √41 cm. In this case, a = 4.5 * √41 = 4√41 cm, which matches the value in the answer choices.

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The domain of the function f(x)= -long(5-x)+b is Dom(f) = [– ∞,  5]., range is all real numbers except for x = 5.

IF function is the process or state of instruction that text inputs performance is specific task and produce an output functional key components of programming language allowing the quarter to create complex commands with simple instruction for example a function can be used to add two numbers together or to generate a random number function can also be combined to create more complex sequence of instruction.

The range of this function is all real numbers as the long function will never return a negative value. The value of b determines the exact range of the function, as it shifts the graph up or down.

The formula is: f(x) = - log(5 - x) + b.

Limitation for the f domain:

5 – x > 0

x < 5

Hence, f's domain is

Dom(f) = {x ∈ R:  x < 5}

Alternatively by notating intervals,

Dom(f) = [– ∞, 5].

Secondly, we wish to demonstrate that there is always an x Dom(f) for any given y R.

y = f(x) (x)

Once we've demonstrated that, we can say that f's operating range is R. (all real numbers).

How to find x in an equation:

[tex]y = f(x)\\y = - log(5 - x) + b\\y - b = - log(5 - x) (5 - x)\\-(y - b) = log(5 - x) (5 - x)\\b - y = log(5 - x) (5 - x)\\5 - x = 10^{(b - y) (b - y)}\\x = 5 - 10^{(b - y) (b - y)}\\[/tex]

Because y is not constrained, the range of f is R. (all real numbers).

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The domain of the function is all real numbers , except x = 0

The domain of a function is the set of values that we are allowed to plug into our function. This set is the x values in a function such as f(x). The range of a function is the set of values that the function assumes. This set is the values that the function shoots out after we plug an x value in.

The range is the set of outputs of a relation or function. In other words, it's the set of possible y values. Recall that ordered pairs are of the form (x,y) so the y coordinate is listed after the x. The output is listed after the input.

Given data ,

Let the domain of the function be represented as D

Let the equation be represented as A

Now , the value of A is

Substituting the values in the equation , we get

When the value of the x of function approaches zero from the positive direction , the function f ( x ) gets larger

And , when the value of the x of function approaches zero from the negative direction , the function f ( x ) gets larger in the negative direction

Now , the domain of the function will be all the real numbers except 0

Hence , the domain of the function is all real numbers except 0

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Answer:$1. 45

Step-by-step explanation:

The bill is $1

the quarter is .25

and the nickels together are .20

add everything together its 1.45

First, we need to know the value of each coin. The top coin is a quarter, and its value is $0.25. The four coins below are nickels, and they have a value of $0.05. The dollar bill at the bottom has a value of $1.00.

If we have one quarter, we start with a value of $0.25.

[tex]$0.25[/tex]

Now, we add on the nickels.

[tex]0.25 + 0.05+ 0.05+ 0.05+ 0.05 = 0.45[/tex]

Now we have a total of $0.45.

Adding the dollar would look like this:

[tex]1.00 + 0.45 = 1.45[/tex]

Therefore, the value of all the money in the picture is $1.45.

Answer: rectangle

Step-by-step explanation: because i have eyes

Yes, Ernesto has enough oil to make both recipes. Each recipe calls for 1/3 cup of oil, and he has one cup of oil. Therefore, he has enough oil to make both recipes with some oil left over.

Answer:

  n ∈ ℕ . . . (Natural numbers)

Step-by-step explanation:

You want the domain of the relation s(n) = 7+3n so that it defines the sequence 10, 13, 16, ....

The domain of a function is the set of "input" values for which the function is defined. Here, the function is intended for use with values of n that are Natural numbers:

  domain = ℕ

__

Additional comment

In general, the domain of any function that defines a sequence will be Natural numbers. That is, values of n will be 1, 2, 3, ....

Occasionally, the sequence represents a relation that is of interest for values of n other than positive integer values. In such a case, the domain may be Whole numbers, or Real numbers.

Step 1: Calculate the length of one platter. To calculate the length of one platter, multiply 0.4 meters by 4 sides, which gives us a total of 1.6 meters.

Step 2: Calculate the length of the row of platters. To calculate the length of the row of platters, multiply the length of one platter (1.6 meters) by the number of platters (7), which gives us a total of 11.2 meters.

Therefore, the row of platters is 11.2 meters long.

What exactly are algebraic word issues? The process of converting phrases into equations and then solving those equations is known as solving algebraic word problems. a single variable, and. In a real-world situation, the variable typically stands for an unknowable quantity.

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Answer:

  (x, y) = (-3, -5)

Step-by-step explanation:

You want to solve the given system of equations by elimination.

To eliminate a variable from the equations, we need to add them in such a way that the coefficients for one of the variables have a total of zero.

Here, we observe that the y-coefficients are the same, so subtracting one equation from the other will cancel the y-terms. We want the result of that subtraction to give an equation with x having a positive coefficient, so we elect to subtract the second equation from the first:

  (2x -3y) -(-5x -3y) = (9) -(30)

  7x = -21 . . . . . simplify (y-terms are gone, x-term has positive coefficient)

  x = -3 . . . . . . . divide by 7

The value of y can be found from either equation. We choose to use the first one:

  2x -3y = 9

  2(-3) -3y = 9 . . . . . . substitute -3 for x in the first equation

  -15 = 3y . . . . . . add 3y-9

  -5 = y . . . . . . . divide by 3

The solution is (x, y) = (-3, -5).

The graph of this piecewise function is a step function, with steps at x=1 and x=2, where the value of the function changes.

The cost of parking for hours is a function of the number of hours. It can be modeled by a piecewise function, where the cost depends on the number of hours you park.

Here's the piecewise function for the cost of parking in dollars:

f(x) = {5, if 0 < x <= 1

{10, if 1 < x <= 2

{12, if x > 2

The graph of this piecewise function is a step function, with steps at x = 1 and x = 2, where the value of the function changes. The value of the function is constant in each interval (0, 1), (1, 2), and (2, infinity).

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Answer:

Step-by-step explanation:

S=24000x(1.043)^t

The correct option regarding the number of solutions of the sustem of equations is given as follows:

No solution.

We want to obtain the graphic solution for the system of equations, hence we obtain the point of intersection of the two equations.

The line going through points (0,4) and (3,3) is given as follows:

y = -0.33x + 4.

The line going through points (0,-1) and (3,-2) is given as follows:

y = -0.33x - 1.

The two functions have the same slope, hence they are parallel lines, and thus the number of solutions is of zero.

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The toddler crawled a total of 24 feet (2 yards = 6 feet and 8 more feet).

The question asks how many feet the toddler traveled. To answer this question you need to convert yards to feet then add the measurements together. One yard is equivalent to three feet, so the toddler traveled two yards which is six feet. The toddler then stopped and continued to crawl eight more feet. To figure out the total distance the toddler traveled, you need to add the two measurements together. Six feet plus eight feet is equal to fourteen feet. Therefore, the toddler traveled a total of twenty-four feet.

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Answer:The student made a mistake and explain the specific error that was made. Support your answer using the correct vocabulary. The mistake has been done in Step 2.

PART A: There is a mistake in Step 2, Distributive Property has been employed incorrectly.

7 has to multiply by both the terms inside the bracket, but it has been multiplied with the first term only.

7(-2 x-8 y)=-14 x-56 y and 7(-2 x-8 y) -14 x-8 y

Hence, -5(x-16 y)+7(-2 x-8 y)=-5 x+80 y-14 x-56 y

PART B :

The given equation is

-5(x-16 y)+7(-2 x-8 y)

Applying distributive property to the above equation that states A(B+C)=AB+AC, we get :

-5 x+80 y-14 x-56 y

Now, Writing the terms with the same variable together, we get

(-5 x-14 x)+(80 y-56 y)

Proceeding with solving terms inside the brackets according to BODMAS, we get,

-19 x+24 y

Hence , −5(x − 16y) + 7(−2x − 8y) = -19x +24y

The playground's length and breadth are 12 yards and 17 yards, respectively.

The playground's area is 204 square yards, according to the statistics provided in the inquiry.

204 square yards is the area.

The playground's breadth is 5 yards more than its length.

Let the playground be 'l' yards long.

The playground's width will then be (l + 5) yards.

The formula for the playground area is Length × Width.

A =  Length x width

204 = l (l + 5)

204 = + 5l

+ 5l - 204 = 0

+ 17l - 12l - 204 = 0

l (l + 17) -12 (l + 17) = 0

(l + 17) (l - 12) = 0

(l + 17) = 0 or (l - 12) = 0

l = -17 or l = 12

The length value cannot be negative.

As a result, the length is 12 yards.

The breadth is thus equal to l + 5.

Width = 12 + 5

17 yards wide

As a result, the length is 12 yards and the breadth is 17 yards.

Option (b) is the right answer.

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A playground has a surface area of 204 yd2. The playground's breadth is 5 yards greater than its length. Determine the playground's length and breadth.

a.) 17 yards in length, 22 yards in breadth

b.) 12 yard length, 17 yard breadth

c.) 22 yard length, 17 yard breadth

d.) 17 yard length, 12 yard breadth

Answer & Step-by-step explanation:

To find the total rental cost, we need to add the flat fee to the mileage charge. Here are the steps:

1. Multiply the number of rental days by the flat fee: 3 days x $25/day = $75

2. Multiply the total miles driven by the mileage rate: 150 miles x $0.20/mile = $30

3. Add the flat fee and the mileage charge to get the total cost: $75 + $30 = $105

Therefore, the customer's total rental cost is $105.

Answer:

105$

Step-by-step explanation:

The answer to our inquiry is that 180 grams of zinc contain a particular compound.

Ratios contrast two figures by ordinarily dividing them. A/B would be your formula if you were going to compare another data item (A) to this other data point (B).

The zinc to copper ratio in a particular compound is 4: 11.

Copper weighs 495 grammes in the chemical.

How much zinc does it chemically contain in grammes.

Assume that y is the scalar multiple of zinc and copper.

as stated

The proportion of zinc over copper in a certain compound is 4 to 11.

Copper weighs 495 g in the chemical.

Equation is than

11y = 495

11y = 495

y = 495/11

y = 45

Zinc in a particular chemical = 4y

= 4x45

= 180 grams

Therefore 180 grams of zinc contain in a certain chemical .

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When data are positively skewed, the mean will be greater than the median.

This is because the mean will be pulled in the direction of the higher values in the data set, while the median will ignore the higher values and be more affected by the lower values in the data set.

Positively skewed data is characterized by a long tail on the right side of the distribution graph. This means that the data set contains more values that are higher than the mean and median. As a result, the mean will be a higher value than the median, as the mean will be pulled in the direction of the higher values. The median, however, will remain unaffected by the higher values and will be more affected by the values at the lower end of the distribution.

the complete question is :

When data are positively skewed, the mean will usually be:

a. greater than the median

b. smaller than the median

c. equal to the median

d. positive or negative depending on the data set

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Due to length restrictions, we kindly invite to read the explanation below for further details on equivalence of trigonometric expressions.

In this problem we find five case of trigonometry expressions whose equivalence must be proved by means of algebra properties and trigonometric formulas. Now we proceed to show the solution for each case:

Case 3:

tan θ · cos θ

(sin θ / cos θ) · cos θ

sin θ

Case 5:

(1 - cos θ) · (1 + cos θ)

1 - cos² θ

sin² θ

Case 6:

(1 + sin θ) · (1 - sin θ)

1 - sin² θ

cos² θ

Case 7:

(sec θ + tan θ) · (sec θ - tan θ)

sec² θ - tan² θ

1

Case 10:

(tan θ + cot θ) / tan θ

1 + cot θ / tan θ

1 + cot² θ

csc² θ

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Common theorems, properties, or strategies to the proof of the Triangle Proportionality Theorem and its converse include using similarity and congruence, angle-angle criterion, and transitive property of equality.

The Triangle Proportionality Theorem states that if a line is drawn parallel to one side of a triangle to intersect the other two sides, then the ratio of the lengths of the intersecting lines is equal to the ratio of the lengths of the corresponding sides of the triangle.

The converse of the Triangle Proportionality Theorem states that if two pairs of corresponding sides in two triangles are proportional, then the two triangles are similar.

Overall, these theorems, properties, and strategies form the basis for proving both the Triangle Proportionality Theorem and its converse, and they are used to establish the relationships between the lengths of sides and angles in triangles.

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The quotient to the expression is 1/64

Exponent is a mathematical operation, written as an. Here the expression an involves two numbers, the base 'a and the exponent or power 'n'. Exponents are used to simplify algebraic expressions.

Given here: The expression 4⁻⁵ / 4⁻²

When multiplying two bases of the same value, keep the bases the same and then add the exponents together to get the solution.

Thus simplifying the expression we get

4⁻⁵ / 4⁻²

4⁻⁵× 4²

4⁻⁵ ⁺ ²

4⁻³

1/64

Thus the quotient is 4⁻³

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The area of the forest decreases by 6.25% each year, and after 15 years, the area will be approximately 1089 km.

The area of a forest is a crucial aspect of understanding its size and its impact on the environment.

In this question, we are know that the forest with an initial area of 2500 km, which decreases by 6.25% each year. Our task is to find the area of this forest after 15 years. To do this, we need to perform a calculation that takes into account the decrease in area each year.

Mathematically, we can represent the area of the forest after n years as:

A = 2500 * (1 - 0.0625)ⁿ

Where n is the number of years that have passed. To find the area after 15 years, we can plug in n = 15:

A = 2500 * (1 - 0.0625)¹⁵

Using the calculator provided, we find that the area of the forest after 15 years is approximately 1089.38 km. Rounding this to the nearest square kilometer, we get 1089 km.

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Answer:

Step-by-step explanation:

No, the number of students at the school is not proportional to the number of teachers. In a proportional relationship, two quantities have a constant ratio. However, in this case, the number of teachers is not directly proportional to the number of students because there is a fixed number of teachers regardless of the number of students. Even if the number of students changes, the number of teachers remains the same.

A more appropriate way to describe the relationship between the number of teachers and students at the school is to say that there are 2 teachers for every 48 students, or that the ratio of teachers to students is 2:48, which simplifies to 1:24.

The quantity of lunch specials conceivable is 2 sandwiches * 2 beverages * 3 treats = 12.

The lunch exceptional at Teresa's Café incorporates a sandwich, a beverage, and a sweet. There are 2 choices for sandwiches, 2 choices for beverages, and 3 choices for treats. To decide the quantity of conceivable lunch specials, we want to track down the quantity of blends of these things. The recipe for mixes is n! /(r! * (n - r)!). Nonetheless, since every thing is chosen just a single time, we can basically duplicate the quantity of choices for every thing. For this situation, there are 2 choices for sandwiches, 2 choices for beverages, and 3 choices for pastries, so 2 * 2 * 3 = 12 potential lunch specials.

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7. The percentage of the seats taken by 18,460 attendees out of 34,000 capacity spectators of the Bidvest Wanderers Cricket Stadium is 54%.

8. If a bus can seat 60 passengers and some passengers got off, leaving 0.4 of the seats occupied, the number of passengers who got off the bus is 36, representing 60 percent.

9a) The population that speak Mandarin more than English is 526,200,000.

9b) If the world population is approximately 7 000 000 000 (7 billion), the percentage of the entire population that speaks Spanish is 5.00%.

The percentage represents the ratio of one value compared to another.

The percentage is determined as the quotient from dividing the numerator by the denominator and multiplying by 100.

7) The spectator capacity of the Bidvest Wanderers Cricket Stadium = 34,000

Attendees at a one-day match = 18,460

Percentage of seats taken = 54.3% (18,460/34,000 x 100)

8) Bus passenger capacity = 60

The percentage of seats occupied = 0.4

The number of passengers who got off the bus = 36 (60 x (1 - 0.4)

9) Most Commonly Spoken World Languages:

Mandarin 867 200 000 people

English 341 000 000 people

Spanish 350 000 000 people.

a) The more Mandarin speakers than English = 526,200,000 (867,200,000 - 341,000,000)

b) World Population = 7 billion

Percentage of Spanish speakers to World Population = 5.00% (350,000,000/7,000,000,000 x 100)

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