Percentages
The formula used to solve percent problems
P = (x/100)(W)
Greater than.
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A triangle has angles measuring 30 degrees and 40 degrees. What is the measure of the third angle?
110 degrees
(30/5) + 2 * 3^2 =
24
If there are 6 boys and 3 girls, what is the ratio of girls to boys in lowest form?
1:2
15% off
-15%
or
85%
x is less than 45 as an inequality
x < 45
This means taking out money from an account.
Withdraw
(5 * 3)6 + 8/2 - 6 +3 =
91
Simplify: 16:4
4:1
25% of $150
$37.50
The value of x when:
2x +22 < 64
x < 21
This equation is used to find the amount of space inside an object.
V= l x w x h
or
V = b x h
4 + 2(82 -4) - 20/2 =
114
Solve for x to make these proportional: 5/6 = x/36
x = 30
$300
What is the area of a rectangle with dimensions length = x + 2 and width = 4x
4x2 + 8x
The two formulas used to calculate the circumference and area of a circle.
C = πd
or
C= π2r
A = πr2
5*2 + 10 -3 * 52 =
-55
Simplify: 144:60
12:5
Based on a study, the percentage of students who will go to bed early for tests if the national average is 15 out of 25 students.
60%
The value of x when:
14 -3x > -7
x < 7
The first step in solving this expression, and then it's solution:
-2(-14 ÷ 7)
Combine like terms
4
5*4 (10*2) ÷ 8 - 16 =
34
Last week Bill earned $210 for a 30-hour week. What was his pay rate? What would he have earned for a 40-hour week?
Pay rate = $7/hour In a 40-hour week Bill would have earned $280.