You have 700 free text messages available each month according to your cell phone contract use 10% of your available text messages every day write an exponential decay function showing the number of text messages available each day how many text messages are available after 15 days

chiken

step-by-step explanation:

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated

2b2t

explanation:

2b2t