Hi there! :)

m(x) = 4x + 15
Find the value of "x" that would satisfy m(x) = 7:
4x + 15 = 7
Subtract 15 from both sides:
4x = -8
Divide both sides by 4:
x = -2.
That means they have a common denominator. Hope this helps!
Answer:
19.4
Step-by-step explanation:
diameter= r2
9.7x2=19.4
0.12 x 3 years = 0.36
<span>0.36 X $25,000 = $9,000 </span>
<span>25,000 - 9000 = $16,000 </span>
<span>so its 3 1/2 years</span>