Tamara rewrote the expression 0.2(4+1.4y -2.1). Her steps are shown.
Step 1: 0.2(4+1.4-2.1)
Step 2: 4.2+1.6 - 1.9
Step 3: 4.2-1.9+1.6y
Step 4: 2.3+1.67
Which statement identifies and explains the first mistake Tamara made?
Her first mistake was in Step 2. She added 0.2 to each term instead of multiplying by 0.2.
Her first mistake was in Step 2. She should have only added 0.2 to 4 instead of adding 0.2 to all 3 terms.
© Her first mistake was in Step 3. When reordering the terms, the 1.6y should be negative and the 1.9 should be
positive.
Her first mistake was in Step 3. When reordering the terms, 1.9 should be the coefficient of y rather than 1.6.
