MATHEMATICS
HIGH SCHOOL

Answer: 180% would be written as 1 4/5 in simplest form

MIDDLE SCHOOL

Four equivalent expressions to 33y-11y

Answer:

There are infinitely many, but here are four

1. 22y

2. 66y/2 - 11y

3. 33y - 22y/2

4. -11y + 33y

Step-by-step explanation:

1. Simplify the expression and you get 22y, so 22y is equivalent to 33y - 11y

2. 66y/2 equals 33y, so this expression is equivalent

3. 22y/2 equals 11y, so this expression is equivalent

4. This just flips the order, keeping the negative sign.

A - B can be written as A + (-B), which can be rewritten as -B + A

MIDDLE SCHOOL

Given f (x)=4x-1, what is the domain value if the range is -5?

So domain is what numbers you can put in so for functions lets say f(x)=x+1 if you put in 3 for x then you would have f(3)=3+1 so just put in the values they give you and the function will give you something else so

f(x)=4x-1

f(-5)=4(-5)-1

f(-5)=-20-1

f(-5)=-21

the domain is (-5) and the range is (-21)

f(x)=4x-1

f(-5)=4(-5)-1

f(-5)=-20-1

f(-5)=-21

the domain is (-5) and the range is (-21)

HIGH SCHOOL

Solve for x. 7x = 78

A) x = 546

B) x = 85

C) x = 71

D) x = 11 1/7

Divide by 7 on both sides

78 divided by 7 is 11 and 1/7

Answer is D

78 divided by 7 is 11 and 1/7

Answer is D

7x = 78 is D) x = 11 1/7

HIGH SCHOOL

The _______ is the distance around a circle. A. curved line

B. surface area

C. perimeter

D. circumference

The circumference is the correct.

It can be found using the formula,

It can be found using the formula,

The correct answer is D.

Hope this helps!

Hope this helps!

MIDDLE SCHOOL

A quality assurance specialist makes $22 an hour for the first 40 hours she works during a week and $29 an hour for each hour worked over 40 hours. Which piecewise equation models her total weekly pay y in dollars as it relates to the number of hours x that she has worked during the week?

We want to write a piecewise function that models how much the specialist wins per week. The piecewise function is:

f(x) = $22*x → if x ≤ 40

f(x) = $29*(x - 40) + $880 → if x < 40

What is a piecewise function?It is a function that behaves differently in different parts of the domain.

Here, we can define x as the number of hours, so for x smaller or equal than 40, the function is:

f(x) = $22*x

For x larger than 40, the function will be:

f(x) = $29*(x - 40) + $22*40

Because she gets paid extra for each hour after the 40th one.

The piecewise function is written as:

f(x) = $22*x → if x ≤ 40

f(x) = $29*(x - 40) + $880 → if x < 40

This is the wanted piecewise function.

If you want to learn more about piecewise functions, you can read:

brainly.com/question/3628123

MIDDLE SCHOOL

the rectangler diagram shows the design for a food court at the zoo what is the length of the walkway

Answer: 50ft

Step-by-step explanation:

i had the same problem, i guessed and got it right.

You need to provide more information in order for us to help you with this.

HIGH SCHOOL

A sound wave travels through iron at a rate of 5120 m/s. At what rate do the sound waves travel at km/h

Answer:

Sound waves travel through iron at 11,427,840 km/h.

Step-by-step explanation:

A kilometer is equal to 0.62 miles. An hour is equal to 3600 seconds. Therefore, if a sound wave travels through iron at a rate of 5120 m/s, it would be equal to (5120 x 0.62) km/s. This is equal to 3174.4 km/s which, multiplied by 3600 (the number of seconds that make an hour), would determine the speed in which a sound wave travels through iron. So, as 3174.4 x 3600 is 11,427,840, so sound waves travel at 11,427,840 km/h.

Km/h = 18,432 is the answer to your question.

MIDDLE SCHOOL

Determine the axis of symmetry and the vertex of the given function.

y = 2x2 - 12x + 21

Answer:

the vertex is ( 3 , 3)

Symetric axis‘s equation: x = 3

Step-by-step explanation:

Let‘s name the function ” f ”

f(x) = y = 2x² - 12x + 21

the vertex has coordinates of ( -b/2a , f(-b/2a) )

-b/2a = 12/2(2) = 12/4 = 3

f(-b/2a) = f(3) = 2(3)² - 12(3) + 21 = 3

then the vertex is ( 3 , 3)

the symetric axis has the equation :

x = -b/2a

then

Answer:

Axis of symmetry: x = 3

Vertex: (3,3)

Step-by-step explanation:

I jus got it right on the assignment.

HIGH SCHOOL

Change 75 millimeters to decimeters.

a. 750 dm

b. 7.5 dm

c. 7,500 dm

d.75 dm

In my opinion it is 75 * 0.1 = 7.5 dm