The T-shirt store is having a sale. The cost for the For the first T-shirt purchased is $12. The cost for each additional T-shirt purchased at the same time is only $6. There is no tax on T-shirts. The expression below represents the total cost of how many T-shirts purchased at the same time? 12+6(m-1)

6⋅(m+1) ?

Step-by-step explanation:

Pulling out like terms

3.1  Pull out like factors :

6m + 6  =   6 • (m + 1)

Or its 12y + 6x

it'll continue to go up on the graph

(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

(1,-1) i hope this

step-by-step explanation: