Because Brian reduces his cholesterol level by 13%, he now has 87% of his original cholesterol level. Multiply his original cholesterol level by the percentage of his original cholesterol level he has left (.87) to get his current cholesterol level.
If we want to write the function in vertex form: f ( x) = 6 x² + 5 - 42 x = 6 x² - 42 x + 5 = 6 ( x² - 7 x ) + 5 ... First step is: C ) write the function in standard form ( y = ax² + b x + c )
