MATHEMATICS MIDDLE SCHOOL

Please number 13 and 15

Answers

Answer 1

Answer:

13.

y - the amount from the sale

x - a number of tickets

y = 5x + 40

Domain: x ∈ {0, 1, 2, 3, 4, 5}

Range = {40, 45, 50, 55, 60, 65}

15.

y - the cost of renting a law firm

x - a number of hour

y = 100x + 300

Domain: x ∈ {1, 2, 3}

Range = {400, 500, 600}

Answer:

Option: C is the correct answer.

C. Is a difference of squares: (y + 5)(y − 5).

Step-by-step explanation:

We are given a polynomial expression in terms of the variable y as follows:

$y^2-25$

Now this expression could also be written as:

$y^2-25=y^2-5^2$

This means that the expression is a difference of squares.

Also, we know that:

$a^2-b^2=(a+b)(a-b)$

Here,

$a=y\ and\ b=5$

Hence,

$y^2-25=(y+5)(y-5)$

the answer is C
y² - 25
= y² - 5²
= (y + 5)(y - 5) which is a difference of two squares

Can someone help me with 10 math questions (: A cone has a radius of 5 inches and a height of 18 inches.

What is the exact volume of the cone?

A.
150π in3

B.
300π in3

C.
450π in3

D.
540π in3

Answers

so volue of a cone=1/3 times (area of base[which is a circle]) times height

area of base=area of circle=pi time radius^2
area=pi times 5^2
area=pi times 25=25pi

1/3 times 25pi times 18
25pi times 18 times 1/3
25pi times 18/3
25pi times 6=150pi

the answer is 150π in^3 or 150π cubic inches or C

( to solve, aprox pi to 3.141592 an multiply 150 by 3.141592=471.239 in^3)

Determine the slope of a parallel to the folling line 9x + 7y = 10

Answers

Recall that the slope formula is y=mx+b (m is the slope)

You need to first get y by itself, to do that you subtract 9x on both sides of the equation

9x+7y=10 subtract 9x to the left side where it will cancel it because you're adding a positive to a negative number that are the same, then you subtract 9x to the right side of the equation

when you do that you should get: 7y= -9x+10

Now you divide 7 on both sides

you then should get: y= -9/7x-10/7

10 POINTS AND WILL GIVE BRAINLIESTName the center and radius of the circle whose equation is

10. (x-3)^2 + y^2 = 49.