20 POINTS! A rectangle has perimeter 60. After the width of the rectangle is tripled and the length is increased
by 5, the perimeter is now 90. What were the dimensions of the original rectangle?

Use the information from this article to determine the approximate number of rentals and sales for
this movie. A “transaction” is either an online sale or a rental.

Please dont say cap, I am rlly struggling with this.

b i think

step-by-step explanation:

not really sure

5+2x=a

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(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

step-by-step explanation:

is their an equation anywhere i can take a   look at it and see if i am right.