Question

Which algebraic expression is equivalent to the expression below?

(7x - 5) + 5
A.35x
B.7x
C.7x + 10
D.7x - 10

Answer 1

@dan815

Answer 2

Combine like terms.

Answer 3

You're subtracting 5 then adding 5 again, so what happens?

Answer 4

OH its D

Answer 5

No. xD

Answer 6

They're gonna just cancel out.

Answer 7

-5 + 5 is the same as 5 - 5

Answer 8

wait but 5+5=10 and

Answer 9

No, because it is -5.

Answer 10

And -5 + 5 = 0

Answer 11

oh

Answer 12

So 7x + 0 is the same as what?

Answer 13

7x

Answer 14

oh thx man

Answer 15

Yeah np.

Answer 16

Ok, your equation is:
\[(7x - 5) + 5\]
Since there is no multiplying or dividing, you can get rid of the brackets
\[7x-5+5\]
Now simplify. What is \(-5+5\)? Its the same as \(5-5\), which is \(0\)!
\[7x+0\]
Now, what is any number plus \(0\)? itself. So we can further simplify it
\[7x+0\]\[7x\]And thats it :)

Answer 17

Erm, we've already established that.

Answer 18

That should show all the steps, @jimdhhfidjdjdjfjffj

Answer 19

I know @Unanimoose, just showing the steps incase anybody comes across and wants to see all the steps.

Answer 20

Shannon drove 420 miles. Which expression shows the miles per gallon obtained by her car if she used g gallons of gas on the trip?
A.420 × g
B.420 - g
C.420 + g
D.420 ÷ g

Answer 21

the first one is time and 2nd is dived

Answer 22

2nd or last one?

Answer 23

oh last one mb

Answer 24

NP. Now, we know that it is written as Miles per Gallon right? That means Miles divided by Gallon. We know that they traveled 420 miles, using g galons. Therefore, it is:
\[\text{Miles/Gallon}\]\[420\div g\]