Factoring the equation:
3x^2 + 1/2 x 7(3)
3x^2 + 1/2 x 21
3 (x^2 + 1/2 x 21)
3 (x^2 + 7/2)
3 x 1/2 (2x^2 +7)
3/2 (2x^2 + 7)
The answer would be 2 times whatever the value of x would be
$3.15 would be the cost, after the mark up is added.
Answer:
it's used in conjunction with variance
Whole, integer, and rational
