Expressions and Equations

Miscellaneous

100

What is a letter used to represent an unknown number called?

A variable

200

What is the difference between an expression and an equation?

Expression has no equal sign, equation has two expressions connected with an equal sign

300

What are like terms?

Terms with the same variable (and power) - such as 4 and 7, or 5x and 3x, or 5x² and 9x²

400

What are the 3 sets of inverse operations?

Addition/subtraction

Multiplication/division

Squaring/square root

500

What is the number directly in front of a variable called?

Coefficient

Exponents and roots

100

14²=

196

200

What is the square root of 121?

11

300

What is the cube root of 27?

3

400

7³ / 7 =

49

500

12² - 8² =

80

Solve for x

100

4x= 3

x = 3/4 or 0.75

200

5x - 7 = 23

x=6

300

15x + 25 = 30

x = 1/3

400

5/4 x - 3 = 7

x=8

500

4(2x+7)=60

x=4

Circles

100

The radius of a circle is 13 cm. What is its circumference in terms of pi?

26pi cm

^{Units must be included for points}

200

The area of a circle is 64pi in². What is its diameter?

16 inches

Units must be included for points

300

A circle has a radius of 1.5 cm. What is it's area? Use 3.14 to approximate pi

7.065 cm²

Units must be included for points

400

The circumference of a circle is 4pi cm. What is the area? Use 3.14 to approximate pi

12.56 cm²

Units must be included for points

500

Circle A has an area of 169pi m². Circle B has a radius that is half the radius of Circle A. What is the area of Circle B? You may leave your answer in terms of pi

42.25pi m²

Units must be included for points