You have $60 and your sister has $120. You are saving $7 per week and your sister is saving $5 per week. How long will it be before you and your sister have the same
amount of money? (There will be a variable on both sides of the equation)

30 weeks

Step-by-step explanation:

for this equation a will be the number of weeks

you have, 60 + 7a

she has, 120 + 5a

60+7a = 120 + 5a

2a = 60

a = 30 weeks

I hope that makes sense and helps you!!

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17