Heather has $500 in her savings account. She withdraws $20 per week for gas. Write an equation Heather can use to see how many w

Question

marshall27 [118]

3 years ago

11

Heather has $500 in her savings account. She withdraws $20 per week for gas. Write an equation Heather can use to see how many w

eeks it will take her to have a balance of $220

Mathematics

2 answers:

tatuchka [14] · Answer 1 · 2022-07-11T00:21:44+03:00

Since she has a base amount of $500, that will be your y-intercept. 20 is going to be your slope, and since she's withdrawing it, it will be -20. Here's how the equation would be set up (in y = mx + b):

-20x + 500 = 220

*Subtract 500 from both sides*

-20x = -280

*Divide both sides by -20*

x = 14.

Therefore, it will take 14 weeks.

DerKrebs [107] · Answer 2 · 2022-07-11T02:34:57+03:00

DerKrebs [107]3 years ago

6 0

Equation: 500 - 220 ÷ 20 = x