A formula for the normal systolic blood pressure for a man age A, measured in mmHg, is given as P = 0.006A*2-0.02A + 120. Find the age of a man whose normal blood pressure measures 129 mmHg. Round your answer to the nearest year. The man would be ? years old.​

The man would be 40 years old.

Step-by-step explanation:

Blood pressure as function of age:

Is given by the following equation:

Find the age of a man whose normal blood pressure measures 129 mmHg.

This is A for which P = 129. So

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

.

This polynomial has roots such that , given by the following formulas:

In this question:

Quadratic equation with . So

Age has to be a positive number, so rounding to the nearest year:

The man would be 40 years old.

the answer is 5/3x+7/5y+7