The cost to purchase a song in itunes is $.99 per song. to purchase a song from google music ,you must be a member but google membership fee is $10 in addition each purchase song on google cost $.89 how many downloaded songs, d, must be purchased for google music to be a better value than itunes

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

i believe the answer is c.

b. would be the answer : )

step-by-step explanation:

step 1: add -16x to both sides.

16x−4y+−16x=64+−16x  

−4y=−16x+64

step 2: divide both sides by -4.

−4y /-4 = -16x + 64/-4

answer:   y=4x−16

hope i'm right