Ronny’s Carpet Cleaning uses the equation y = 15x + $22.50 to calculate the total cost, y, to clean carpet for x number of hours. Juan’s Carpet Cleaning uses the table below to calculate the total cost. Juan’s Carpet Cleaning

Number of

Hours (x) Total Cost (y)

1 $38.50
3 $65.50
6 $106.00
8 $133.00

Which company charges less per hour, and by how much?

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

can you make your screen more see able?

then i might be able to .

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240