a formula for the systolic blood pressure for a man age A messured in mmHg. is given as P=0.006A - 0.02A + 120 find the age of a man whose normal blood pressure measures 126mmHg

Question

a formula for the systolic blood pressure for a man age A messured in mmHg. is given as P=0.006A - 0.02A + 120 find the age of a man whose normal blood pressure measures 126mmHg

Round your answer to the nearest year

How old will the man be

Answer 1

I think the equation should be

P(A) = 0.006A² - 0.02A + 120

126 = 0.006A² - 0.02A + 120

0 = 0.006A² - 0.02A - 126+120

0=0.006A² - 0.02A - 6

you can use the quadratic formula to solve for the man's age.

A = (-b ± sqrt[b² - 4ac]) / (2a)

A = (0.02 ± sqrt[(-0.02)² - 4(0.006)(-6)]) / (2*0.006)

A = (0.02 ± sqrt[0.1444]) / 0.012

A = 33.3, -30

Since age cannot be negative, your answer is 33 years old