Janelle likes to keep all her savings goals separate, so she has an account for each one, including an account to save for her college textbooks every semester. She buys books about every 6 months, with roughly $550 due each time. She likes to save the money up in installments, with auto-deposits from each of her twice monthly paychecks. She’s wondering if her online savings account, earning 0.75%, is still her best option for monthly deposits toward her textbooks. Which account would you recommend? Why?

(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

one set of data has more variation than the other. hope this !

there still no table