Let r1 and r2 be the roots of the quadratic equation x2 - 12x + 9 = 0. determine the value of 2 + 2 . (hint: in the first recitation the relationship between the coefficients in a quadratic and the sum and product of the roots of the quadratic was proven. use this relationship to solve the problem without finding either root.)

The value of is 126

Step-by-step explanation:

We can use the definition of Vieta's formula for quadratics:

Given , if the equation f(x) = 0 has roots and then

So suppose and are the roots of the equation to find , note that from our Vieta's formula for quadratics we have

and

Therefore

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

a. 32 degrees

step-by-step explanation:

here we have to use the rule.

m∠e = 1/2 (major arc - minor arc)

m∠e = 1/2 (212 - 148)

m∠e = 1/2 (64)

m∠e = 32 degrees

answer: a. 32 degrees

you