Equations & Expressions
solve for x: x + 7 = 15
x = 8
How many degrees are in a triangle?
180
What is the definition of a function?
A relation where each input has only one output
What is -4 + 7?
3
Sally has 3 apples. She buys 2 more. How many does she have?
5 apples
Simplify:
3(x + 2)
3x + 6
Find the area of a rectangle with length 8 and width 3
24 units²
Is this a function? (2,3), (3,4), (2,5)
No, 2 maps to two outputs
Simplify: 3²
9
A car travels 60 miles in 1 hour. How far in 4 hours?
240 miles
Solve:
2x - 3 = 11
x = 7
Find the volume of a cube with side length 4.
64 units³
Identify the slope: y = 3x + 2
3
Evaluate: (-2)⁴
16
If x - 5 = 12, what is x?
x = 17
Factor:
x² - 9
(x + 3)(x - 3)
A triangle has sides 3 cm, 4 cm, and 5 cm. Is it a right triangle?
Yes, by the Pythagorean Theorem
What is the y-intercept of the line y = -4x + 7?
7
Simplify: 5⁰
1
A rectangle has area 36 and width 4. What is its length?
9 units
Solve:
3(x - 2) = 2x + 4
x = 10
Find the missing angle in a triangle with angles of 40° and 65°.
75°
Find the output when x = -2 in the function f(x) = x² - 3x
f(-2) = 4 + 6 = 10
Multiply: (-3)(-4)(2)
24
If 2 pencils cost $1.20, what is the cost of 5 pencils?
$3.00