-MATH PRE-COMP STUDY PART 2-

Variables

100

Evaluate: 2x+y if x=-2 and y=6

-2

200

Write the phrase as an expression. Use x as 'a number'.

the sum of 25 and a number added to  6 multiplied by a number.

25+x+6x

300

Is 8 a solution of 7f=64-f?

Yes.

400

Evaluate: 8xy²-8 if x=5 and y=3.

112

500

a=63 b=1

Find: a+b, a-b, axb, and a/b.

a+b=64

a-b=62

axb=63

a/b=63

Adding and Subtracting Integers

100

What is (-14)+(-2)?

-16

200

What is (-10)+35?

25

300

What is (-14)+16+23+(-20)?

5

400

Evaluate: 12-(-20)+(-19)

13

500

An ocean trench has an elevation of 15, 985 meters below sea level. Another trench has an elevation that is 8,997 meters higher than the first. Use a negative number to represent the second trench height.

6988

Multiplying and Dividing Integers

100

Solve for ab is a=-3 and b=-1

3

200

Solve: 270/(-30)

-9

300

Evaluate: x/y if x=0 and y=-4.

0

400

translate the following into an equation and solve: find the quotient of 27 and -3.

27/(-3)=-9

500

Solve for ab if a=345 and b=15.

5175

Exponents, Order of Operations, and Average

100

What is the average weight in pounds?

34, 55, 30, 28, 57

40.8 lbs.

200

Write in exponential notation: 9x9x3x3x3x3

9²3⁴ or 9²x3⁴

300

Solve: 4x2⁴

64

400

Solve: (2+4²)/ (2x3²)

1

500

Solve: 5+2x3²/2-7

7

Order of Operations and Average

100

Solve: 4x4-4/4+4

19

200

(7x2)+(9)²-45

50

300

5(3-1)+(-4)²-1

25

400

Find the average: 0,13, 24, -15, 4, 10

6

500

Find the average:-10,-24,-36,-2

-18