It costs $0.50 to download an individual song and $4 to download an album. Jada has $15 to spend downloading music. Write an equation relating the number of individual songs, s, and the number of albums, a, Jada can download

the perimeter is increased by a factor of 2

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation:

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )