Ratios and Proportions
What is the simplest form of the ratio 15:20?
3x + 5 when x = 2.
11
How many degrees are in a right angle?
90 degrees
What is the mode of the following data set: 3, 4, 4, 4, 5, 9, 6, 7?
4
What is the opposite of -8?
8
If 3 out of 5 students prefer apples, what is the ratio of students who prefer apples?
3:5
2x - 8 = 12
x = 10
What type of triangle has all sides of different lengths?
Scalene triangle
If you roll a standard six-sided die, what is the probability of rolling a 3?
1/6 or approximately 16.67%
Simplify -5 + (-3).
-8
Solve for x: 4/7 = x/14.
x = 8
Simplify This Expression 2(3x - 7) - 4x.
2x - 14 or -14 + 2x
Calculate the area of a rectangle with length 8 units and width 5 units.
40 square units
Calculate the mean (average) of the numbers 12, 15, 18, 21, and 24.
18
Multiply -14 by 6.
-84
If 8 pencils cost $4, what is the unit rate per pencil?
$0.50 per pencil
If 5x - 3 = 22, what is the value of x?
x = 5
A ladder is leaning against a wall. The base of the ladder is 6 feet away from the wall, and the ladder is 10 feet long. What is the height at which the ladder touches the wall?
Height of the ladder is equal to 8
50% If you draw a card from a standard deck of 52 cards, what is the probability of drawing a red card (hearts or diamonds)?
50%
If a temperature is -15 degrees Celsius and it increases by 10 degrees, what is the new temperature.
-5 degrees Celsius
A recipe calls for 6 cups of sugar for every 3 cups of flour. How much sugar is needed for 6 cups of flour?
12 cups of sugar
Solve the equation 2(x + 4) = 3x - 1
x = 9
If a circle has a radius of 6 inches, what is its circumference?
37.7 inches
In a class of 30 students, 15 are girls. What is the probability of selecting a girl at random from the class in Percentage?
50%
Calculate the product of -7/3 and 4/5.
-28/15 or approximately -1.87