quiz 22, 10.1 - 10.15 Flashcards Preview

7th math > quiz 22, 10.1 - 10.15 > Flashcards

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

Five times a number is 40. What is the number?

5n = 40
n = 8