Independent Practice Use the formula to estimate the temperature when n = 80 chirps/min.

The formula F = n/4 + 37 estimates the temperature F in degrees Fahrenheit when crickets chirp n times per minute.

A.
29°F

B.
57°F

C.
117°F

D.
20°F

B. 57°F

Step-by-step explanation:

Given:

F = n/4 + 37

Where,

F = temperature in degrees Fahrenheit

n = number of times per minute crickets chirps

Find F when n = 80

F = n/4 + 37

F = 80/4 + 37

= 20 + 37

= 57

F = 57 °F

B. 57 °F

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function