Myra is evaluating the expression –31.7 + 4.5x, when x = 2.1. –31.7 + 4.5(2.1) –27.2(2.1) –57.12 What was Myra’s error?

She added before multiplying instead of multiplying before adding

Step-by-step explanation:

–31.7 + 4.5x

Let  x=2.1

–31.7 + 4.5(2.1)

We multiply before adding

-31.7 +9.45

-22.25

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!