When Gisselle decided to stop eating junk food, she started saving more of her allowance to buy a larger bicycle. She managed to put away $6 every week for 8 weeks
and found a nice used bicycle for $50. She thought that she had close to that amount in
her savings jar. Did she have exactly enough for the bicycle? If not, how much extra or
how much too little did she have?
.

answer: add the !

step-by-step explanation: then we will answer

(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

umm im not really sure because i never had to do this

step-by-step explanation: