Question

Greta says that the expression (2xa)+5 is the same as 2x(a+5). Is she correct?Why or why not?

Answer 1

(2xa)+5 = 2a + 5

2x(a+5) = 2a + 10

Answer 2

I don't understand.Can you please explain it to me?

Answer 3

I worked the problems just as you posted them. Obviously they have different answers.

Answer 4

I'm just making sure that you knew I meant the x was multiplication.I don't understand why the a is not represented with a number.I was thinking that I would have to find what a equals.Thank you for helping me.

Answer 5

Yes, I know you meant x to mean multiplication. We use * for multiplication, though.

We can't find the value of a because you haven't presented any equations. There were no equal signs after your expressions.

Answer 6

Thank you.I didn't know * was multiplication.So, would I explain she is not correct because?I don't know how to answer the why part.I knew they would be different I just don't understand why.

Answer 7

She is not correct because the parentheses are placed differently in each problem.

Learn about the order of operations at this site.

http://www.mathsisfun.com/operation-order-pemdas.html

Answer 8

Thank you so much!

Answer 9

You're very welcome.