Jenny is working on simplifying the algebraic expression 3x+21 when x=5 . Her steps are as follows: Step 1: 35+21 Step 2: 15+21 Step 3: 36 In which step did Jenny make a mistake? What should she have done differently? (1 point) Responses Step 1, Jenny should've multiplied 3⋅5 instead of writing 5 as the exponent. Step 1, Jenny should've multiplied 3 times 5 instead of writing 5 as the exponent. Step 2, Jenny should've calculated the value of 35 to be 243. Step 2, Jenny should've calculated the value of 3 to the 5th power to be 243. Step 2, Jenny should've added 3 and 5 to get 8. Step 2, Jenny should've added 3 and 5 to get 8. Step 3, 15+21 should be 15⋅21 . Step 3, 15 plus 21 should be 15 times 21.
1 answer
Jenny made a mistake in Step 1. The correct calculation should involve multiplying 3 by 5, not writing 5 as an exponent.
The correct step should be: Step 1: \(3 \cdot 5\) which equals \(15\).
So the correct response is: Step 1, Jenny should've multiplied 3 times 5 instead of writing 5 as the exponent.
