Integers & Rational Numbers
What is the sum of –4 and 9?
5
What is the constant of proportionality in the equation y = 4x?
y = 4
What is 25% of 80?
20
Simplify: 4x + 2x
6x
How many degrees are in a straight angle?
180 degrees
What is –7 × 3?
-21
Is the relationship in the table proportional? (x: 2, 4, 6 | y: 3, 6, 9)
Yes
Convert 0.6 to a percent.
0.6 = 6/10 = 60/100 = 60%
Solve: x – 7 = 10
x = 17
What is the area of a square with side length 5 cm?
25 cm ^ 2
What is the opposite of –12?
12
Solve: If 5 apples cost $2.50, what is the cost for 8 apples?
$4
What is 120% of 50?
60
100% 50
10% 5
20% 10
120% 60
Evaluate: 3x – 4 when x = 5
11
What is the perimeter of a rectangle with a length of 7 inches and a width of 5 inches.
24 inches
Simplify: –18 ÷ (–3)
6
Find the constant of proportionality and then write BOTH equations.
x y
4 2
8 4
12 6
Constant of proportionality is 1/2
so y=1/2x and x=2y
A $40 shirt is on sale for 30% off. What is the sale price?
$28
100% $40
10% $4
30% $12
Solve: 2(x + 3) = 14
2(x+3) = 14
2x + 6 = 14
2x = 8
x = 4
A triangle has angles measuring 35° and 65°. What is the third angle?
80 degrees
The temperature in Alaska was –15°F in the morning and rose 20°F by afternoon. What was the temperature in the afternoon?
5 degrees Farenheit.
A car travels 180 miles in 3 hours at a constant speed. How far will it travel in 5 hours?
300 miles
A student scored 18 out of 20 on a quiz. What percent did the student score?
18/20 = 90/100 = 90%
Noah earned $12 per hour and worked x hours. If he earned $96, how many hours did he work?
x = 8
A circle has a diameter of 6 cm. What is the area? (Use π ≈ 3.14)
28.26 cm ^ 2