Math 7A: Midterm

Integers

100

-7 + -8

-15

200

-12 + 3

-9

300

23 - 50

-27

400

- 8 x -9

72

500

42 / -7

-6

Rational and Irrational Numbers

100

The opposite of -3.41.

3.41

200

Rational or irrational .345345345345...

rational

300

Is the square root of 27 rational or irrational?

irrational

400

The square root of 34 to the nearest tenth.

5.8

500

Rewrite as a fraction:
.2777777777...

5/18

Proportions

100

Proportional of non proportional:

 A straight line that goes through the point (0, 6).

non-proportional

200

The slope of a proportion whose equation is 

y = 2/3 x

2/3

300

The constant of proportionality of a relationship including the point (-6, 3).

-1/2

400

The equation of a proportion whose slope is 6.

y = 6x

500

The equation of a proportional relationship including the points (8, -14) and (-4, 7).

y = -7/4

Ratios and Rates

100

A car traveled 150 miles on 5 gal of gas. Find the unit rate.

30 miles / 1 gal

200

If Judy walks 6 km in 1.5 hours, how many will she walk in 4 hours?

16 km

300

The better buy:

3 batteries for $4.80
12 batteries for $14.76

12 batteries for $14.76

400

The better buy:

11 books for $99
29 books for $203

29 books for $203

500

(4/7) / (17/28)

Put your answer in simplest form!

16/17

Exponents

100

3³ x 3⁸

3¹¹

200

The number .00000067 in scientific notation.

6.7 x 10⁷

300

x^-3

1 / x³ 

400

The quotient of 4.8 x 10¹⁷ and 6 x 10⁶.

8 x 10¹⁰

500

(x²y^-3z) / (yz^-3)

(x²z⁴) / (y⁴)?