Algebra
What is the solution to the equation 2x+3=11?
2x+3=11⇒2x=8⇒x=4
If an item costs $50 and increases in price to $60, what is the percent increase?
Percent increase = 60−50/50×100=20%
What is the median of the set of numbers: 3, 7, 9, 1, 5?
Median = 5
What is 7+8−4?
7+8−4=11
If Sarah has 3 apples and buys 5 more, how many does she have?
8 apples
Simplify the expression 4(x+2)−3x
4(x+2)−3x=4x+8−3x=x+8
A jacket was originally priced at $80 and is now $64. What is the percent decrease?
Percent decrease = 80−64/80×100=20%
Define the mode of a set of numbers.
Mode = The number that appears most frequently.
What is the product of 6 and 9?
54
A car travels 60 miles in 1 hour. How far will it travel in 2.5 hours?
150 miles
What is the value of xx in the equation 3x−5=16?
3x−5=16⇒3x=21⇒x=73x−5=16⇒3x=21⇒x=7
If a population of a town grows from 1,200 to 1,320, what is the percent increase?
Percent increase = 1,320−1,200/1,200 × 100=10%
What is the mean of the numbers: 4, 8, 6, 10?
Mean = 4+8+6+10/4=7
144 /12
12
If a shirt costs $20 and is on sale for 25% off, what is the sale price?
$15
Solve for y: 2y+4=3y−5.
2y+4=3y−5⇒9=y
A car's value decreases from $20,000 to $15,000. What is the percent decrease?
Percent decrease = 20,000−15,000/20,000 × 100=25%
How do you find the range of a set of numbers?
Range = Highest number - Lowest number.
What is the greatest common factor of 24 and 36?
12
A class has 24 students. If 1/3 are absent, how many students are present?
16
What is the slope of the line represented by the equation y=2x+1?
Slope = 2
If a student scores 75 out of 100 on a test and then scores 90 out of 100 on the next test, what is the percent increase in their score?
Percent increase = 90−75/75 × 100=20%
What is a histogram used for in statistics?
A histogram is used for displaying the distribution of numerical data.
What is 15^2−10^2?
125
If a recipe requires 3 cups of flour for 12 cookies, how much flour is needed for 30 cookies?
7.5 cups