Jenny is working on simplifying the algebraic expression 3^x + 21

Question

when x=5
. Her steps are as follows:

Step 1: 3^5+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 2, Jenny should've added 3 and 5 to get 8.

Step 2, Jenny should've calculated the value of 3^5
to be 243.
.

Step 3, 15+21 should be 15⋅21

.
Step 3, 15 plus 21 should be 15 times 21.

Step 1, Jenny should've multiplied 3⋅5
instead of writing 5 as the exponent.

Answer 1

Jenny made a mistake in Step 2. She should've calculated the value of \(3^5\) to be 243, not 15.

Thus, the correct response is: Step 2, Jenny should've calculated the value of 3^5 to be 243.