Answer:
Myra's Error: Addition instead of multiplication
Correct answer: -22.25
Step-by-step explanation:
Myra is evaluating the expression.
Expression: -31.7 + 4.5x for x=2.1
Step 1: Put x=2.1 into expression
Myra's Steps Correct Step
-31.7 + 4.5(2.1) -31.7 + 4.5(2.1)
Thus, first step correct.
Step 2: Simplify 4.5(2.1) by multiply
Myra's Steps Correct Step
-27.2(2.1) -31.7 + 9.45
Thus, second step incorrect.
Therefore, Myra's error in second step. She did addition(-31.7+4.5) instead of multiplication(4.5×2.1)
Step 3: Combine like terms
-31.7 + 9.45 = -22.25
Hence, The correct answer of the given expression is -22.25
