8th Grade Math Review:

Piece of Pi

100

What is the value of  pi (pi)

pi = 3.14

200

What would the circumference be of a circle with a diameter of 4?

approximately 12.56

300

What is the area of a circle with the radius 9 cm?

Close to 254.34 

cm^2

400

What is the area of a circle with a diameter of 13m?

132.665m2

500

What is the radius of a circle with an area of 140m²?

about 6.677m

600

What is the diameter of a circle that has an area of 3.14cm?

d = 2m

Shapes

100

What is the formula for volume of a cylinder?

V = 

200

What is the volume of a cylinder with a radius of 2cm and a height of 10 cm?

V=125.6cm²

300

What is the formula for the volume of a cone?

V = 

1/3*pi*r^2*h

400

What is the volume of a cone with a diameter of 12cm and a height of 14cm?

V= 1,582.56cm³

500

What is the volume of a cylinder with a diameter of 50cm and a height of 100cm?

V = 19625cm³

600

If the volume of a cone is 2400cm³ what would the volume of a cylinder with the exact same height and radius be?

V=7200cm³

Algebraic Expressions

100

ix x+5 = 7 an algebraic equation or an algebraic expression?

It is an algebraic equation.

200

Solve for x:

x+17 = 29

x=12

300

solve for x:

3x-5=13

x=6

400

solve for x:

3x-7=5x+13

x = -10

500

Solve for x:

5x - 15 = 5x + 24

No Solution

600

2(x-4) +x+7 = 5 - 3(2 - x)

Infinite Solutions

Slope Dude

100

What is the slope intercept form for an algebraic equation?

y=mx+b

200

What is the slope and y-intercept for the following equation:

y=3x+5

slope = 3

y-intercept = 5

300

What is the slope for a line crossing the points (1,5) and (2,10)?

m=5

400

What is the slope  and y-intercept for the equation:

y-5=2(

1/2x-2)

slope = 1

y-intercept = 1

500

Write an equation in slope-intercept form given that the line passes through the two points: (4,10) and (0, 2)

Y = 2x + 2

600

Write an equation for a line that passes through the points (-2,-4) and (0, 6)

y = 5x + 6

Fun with Functions

100

Find the range for the function f(x) = x -7 for the inputs: 1, 3, and 5

Range: -6, -4, -2

200

Solve the function when:

f(x) = 

1/2*x^2-3; x=4

f(4)= 5

300

What is the domain given the following:

(1,3), (1,4), (2,7), and (-1,5)

Domain: -1,2,1

400

What is the domain and range for the following?

(-1,3),(-1,0),(0,0),(2,-3),(2,-6)

Domain: -1,0,2

Range: -6,-3,0,3

500

Evaluate the function:

f(x)=2x-7 for x=-1,3,5

f(-1) = -9

f(3) = -1

f(5) = 3

600

Evaluate the function:

f(x) = (5-2x)+7 for x=1,3,5

f(1) = 10

f(3) = 6

f(5) = 2