Which coat has the lowest sale price? A. a 62$ coat with 15% off
B. a $74 coat with 30% off
C. a $58 coat with 10% off
D. a 68$ coat with 25% off

Hello!!!

D. a $58 coat with 10% off

if you would find another question like this a tip:

go through and do all the math

A. $52.70

B. $51.80

C. $52.20

d. $51.00

so now we know all the discounted prices we can find the answer way faster

just a small tip for next time

   Have a wonderful day!!!

(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

2425

step-by-step explanation: