Math Flashcards
7 cards from real ACT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Math flashcards as text
What is the y-intercept of the line y = 3x - 7?
Answer: -7
In slope-intercept form y = mx + b, the y-intercept b is -7.
Simplify: 3(2x + 4) - 5x.
Answer: x + 12
Distribute to get 6x + 12 - 5x, which simplifies to x + 12.
If the ratio of boys to girls in a class is 3:2 and there are 15 boys, how many girls are there?
Answer: 10
Each ratio unit equals 5 students, so girls = 2 × 5 = 10.
What is the value of x in the proportion x/8 = 9/12?
Answer: 6
Cross-multiply: 12x = 72, so x = 6.
What is the volume of a cube with side length 3?
Answer: 27
Volume = side^3 = 3^3 = 27.
Solve the system: x + y = 10 and x - y = 4. What is x?
Answer: 7
Adding the equations gives 2x = 14, so x = 7.
What is 3/4 expressed as a percent?
Answer: 75%
3 ÷ 4 = 0.75, which equals 75%.