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- Question 1 of 10
##### 1. Question

## 1. Simplify the expression.

## 10aÂ â€“Â 9aÂ +Â 4 Â +Â 4 a

CorrectIncorrect - Question 2 of 10
##### 2. Question

## 2. Simplify the expression.

## 4x + 5x + x + x

CorrectIncorrect - Question 3 of 10
##### 3. Question

## 3. Simplify the expression.

## 12xÂ â€“Â 3Â +Â 3Â â€“Â 8x

CorrectIncorrect - Question 4 of 10
##### 4. Question

## 4. Simplify the expression.

## 14Â â€“Â 9 tÂ +Â 4 tÂ +Â 2Â +Â 6 t

CorrectIncorrect - Question 5 of 10
##### 5. Question

## 5. Simplify the expression.

## 8

*x*Â â€“Â 5*x*CorrectIncorrect - Question 6 of 10
##### 6. Question

## 6. Simplify the expression.

## 9nÂ â€“Â 7 nÂ +Â 2Â +Â 10n

CorrectIncorrect - Question 7 of 10
##### 7. Question

## 7. Simplify the expression.

## Â s + 9s + s + s + s + s

CorrectIncorrect - Question 8 of 10
##### 8. Question

## 8. Simplify the expression.

## 8 â€“ 8 n + 6 n + 4 + 9 n

CorrectIncorrect - Question 9 of 10
##### 9. Question

## 9. Simplify the expression.

## -17 – 10m – 13 + 14m

CorrectIncorrect - Question 10 of 10
##### 10. Question

## 10. Simplify the expression.

## y + 8y

CorrectIncorrect