Question

Medal!



Claire was asked to simplify the following expression below.

6 × y + y × 4

She performed the following steps and claimed that she had generated an equivalent expression.

Step 1. 6y + y × 4
Step 2. 7y × 4
Step 3. 28y

Part A.
Using y=2 explain why Claire is incorrect.

Answer 1

order of operations says that multiplication goes before addition, so in step 1 it's supposed to be yx4 to get 6y+4y=10y

just plug in y=2 to check your work

Answer 2

Can you help me do that? I mean I have been trying to figure out by replacing all of the y's with the 2's, but my answer is not working. @amonaroll32

Answer 3

well, 10(2)=20 and 28(2)=56

Answer 4

since they don't equal it's incorrect

Answer 5

Where did you get the 10 and the 28?

Answer 6

ok okay I got it.

Answer 7

Step 3. 28y from the question

10y from my first post

Answer 8

Can you help on another part of this same question please?

Answer 9

Part B
Write an expression with one term that is equivalent to the expression Claire was asked to simplify

Answer 10

first post :)

Answer 11

Can you just repost that for me because I don't know what you mean by first post.

Answer 12

order of operations says that multiplication goes before addition, so in step 1 it's supposed to be yx4 to get 6y+4y=10y

just plug in y=2 to check your work

so 10y is your answer

Answer 13

So can I just replace another number for y?

Answer 14

Or is it just 10y?

Answer 15

Please answer.

Answer 16

@amonaroll32

Answer 17

just 10y

Answer 18

Thank you.