Numbers & Pre-Algebra
What is 15% of 200?
30
Solve: x + 7 = 12
x = 5
What is the slope of y = 2x + 3?
2
How many degrees are in a triangle?
180°
If f(x) = x + 3, what is f(2)?
5
What is the longest side of a right triangle called?
The hypotenuse
Simplify: 3/4 + 1/8
7/8
Solve: 3x − 5 = 10
x = 5
What is the y-intercept of y = −4x + 7?
7
What is the area of a rectangle with length 5 and width 4?
20
What is the mean of 2, 4, 6, 8?
5
If sin(θ) = opposite/hypotenuse, what is cos(θ)?
adjacent/hypotenuse
What is the LCM of 6 and 8?
24
Factor: x² − 16
(x − 4)(x + 4)
Find the slope between (1, 2) and (3, 8)
3
What is the area of a circle with radius 3?
9pi
What is the median of 3, 7, 9, 10, 15?
9
What is tan(45°)?
1
A $50 shirt is discounted 20%. What is the sale price?
$40
Solve: x² − 5x + 6 = 0
x = 2 or x = 3
What is the midpoint of (2, 4) and (6, 10)?
(4, 7)
A right triangle has legs 6 and 8. What is the hypotenuse?
10
If f(x) = x², what is f(−3)?
9
A right triangle has an opposite side of 3 and a hypotenuse of 5. What is sin(θ)?
3/5
What is the formula for percent change?
(New − Old) / Old × 100%
What is the quadratic formula?
x = (−b ± √(b² − 4ac)) / 2a
What is the slope formula?
m = (y₂ − y₁) / (x₂ − x₁)
What is the area formula for a triangle?
A = ½ × base × height
What is the slope-intercept form of a line?
y = mx + b
What are the three SOHCAHTOA formulas?
sin = O/H, cos = A/H, tan = O/A
What is the simple interest formula?
I = Prt
What is the formula for the sum of an arithmetic sequence?
Sₙ = n/2 (a₁ + aₙ)
What is the distance formula?
d = √[(x₂−x₁)² + (y₂−y₁)²]
What is the Pythagorean theorem formula?
a² + b² = c²
What is the formula for the average rate of change of a function from x = a to x = b?
(f(b) − f(a)) / (b − a)
What is the formula for the area of a triangle using two sides and the included angle?
A = ½ab sin(C)