Flashcards in quiz 22, 10.1 - 10.15 Deck (9)

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1

## -8 + (-4) =

### -12

2

## 16 + (-9) =

### same as 16 - 9 = 7

3

## 5 - (-6) =

### same as 5 + 6 = 11

4

## -4(-8) =

### 32

5

## -20/4 =

### -5

6

## 3 to the 4th power =

###
3 x 3 x 3 x 3 =

9 x 9 =

81

7

## The sum of 9 and three times a number is 21. What is the number?

###
3n + 9 = 21

3n = 12

n = 4

8

## Two thirds of a number is 10. What is the number?

###
2/3n = 10

3/2 * 2/3n = 10 * 3/2

n = 15

9