15,000 x .05 = 750
750 + 15,000 = 15,750
$15,750 is the total Robert paid for the used car.
The answer to your math problem is 4x=x^2-12
Hopefully this photo helps
<span>10.5=5z
re-order
5z = 10.5
divided both sides by 5
5z/5 = 10.5/5
Simplify
z = 2.1
Answer is </span>C. z= 2.1
