8th grade Semester 1 Review

Ch. 1

100

-4 + (-13)

-17

200

is "21.23893...." a ration or irrational number?

Irrational

300

Write 0.24 as a fraction in simplest form.

6/25

400

2 3/5 x -1/3

-13/15

500

Lava rests 220 below the earth’s surface. When it erupts, at its highest point, it reaches 910 feet above the earth’s surface. How far does the lava travel from its lowest to highest point?

1,130 feet

Ch. 2

100

Factor: 6x - 36

6(x-6)

200

Simplify this monomial: 2k³ x 4k¹²

8k¹⁵

300

Is this written in proper scientific notation?

0.99 x 10¹²

No

400

Add these numbers in scientific notation.

(6.45 x 10⁷)+ (2.55 x 10⁷)

9 x 10⁷

500

Simplify this expression.

7(-3 - 3w)+7(w -2)

-14w -35

Ch. 3

100

Solve for m. 

-7m = 56

m= -8

200

Solve for m

3(5m-6) = 6m

m=2

300

12x +31 > 7

x>-2

400

92< -23k

-4 > k

500

-2(3x-5)=2x+10-8x

All real numbers

Ch. 4

100

Using this function, y = 4x - 5, find y when x = -3

y = -17

200

Find the slope between the 2 points

 (3,4) and (5,-6)

m = -5/1

300

What is the domain of this relation? 

(-1,2) (3,4) (-1,3) (3, 5)

{-1,3}

400

Is this a function? 

(-1,2) (3,4) (-1,3) (3, 5)

No

500

Find the slope between the 2 points.

(-3,9) (-3,2)

Undefined

Miscellaneous

100

Is pi rational or irrational?

Irrational

200

What is the square root of 289?

17

300

In the equation y=mx+b, the "b" represents what part of the function?

The y-intercept

400

Factor this expression.

12a + 39b -8a -9b

2(2a+15b)

500

Convert 0.2222222... into a fraction.

2/9