Algebra
Write an equation to represent the statement: "Five times a number decreased by 2 equals 13."
5n-2=13,
n=3
What is the formula for the area of a triangle?
1/2bh or (bh)/2
What is the mean of the numbers 2, 4, 6, 8, and 10?
Mean = 6
What is the ratio of 8 to 12 in simplest form?
2:3 or 2/3
What is
1/2+2/3
7/6 or 1.16667
What is the solution to the equation
2x+3=11
x = 4
Calculate the perimeter of a rectangle with a length of 8 cm and a width of 5 cm.
Perimeter = 26 cm
What is the probability of rolling a 3 on a standard six-sided die?
Probability =
1/6
What is b when a = 6?
a/b=3/4
b = 8
Subtract
3/4-1/2
1/4
Simplify the expression
3(x+4)-2x
x + 12
What is the volume of a rectangular prism with length 4 cm, width 3 cm, and height 5 cm?
Volume =
60 cm^3
If a set of data has a mode of 5, what does that tell us?
The number 5 appears most frequently.
If a recipe requires 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?
Ratio =
2/3
Multiply
2/5*3/4
6/20 = 3/10
What is the value of y in the equation
4y-5=3
y = 2
Identify the types of angles formed when two lines intersect.
Vertical and Adjacent angles
How do you find the median of a data set?
Arrange data in order and find the middle value.
Solve the proportion
5/x=10/15
x = 7.5
Divide
5/6 -: 1/3
15/6 = 5/2 or 2.5
If x = 2, what is the value of
3x^2 +4x-1
19
If a circle has a radius of 7 cm, what is its circumference?
(pi = 3.14)
Circumference = 43.96 cm
If there are 20 students in a class, and 12 are girls, what is the ratio of boys to girls?
Ratio = 8:12 or 2:3
A map scale shows that 1 cm represents 5 km. How many kilometers does 7 cm represent?
35 km
What is the result of
3/8+1/4-1/2
1/8
Solve for x:
5(x-3)=2(x+3)
x = 7
What is the surface area of a cube with a side length of 3 cm?
Surface Area = 54 cm²
A bag contains 3 red, 2 blue, and 5 green marbles. What is the probability of randomly picking a blue marble?
Probability =
2/10 = 1/5
If 3 pencils cost $1.50, how much would 12 pencils cost?
$6.00
What is the decimal equivalent of
7/8
0.875