Algebraic Expression
Simplify
2x + 3 - x +5
x + 8
Find x
x + 2 = 4
X = 2
2n + 2 =4
n = 1
conver to a decimal
5%
0.05
Find the unit rate
3 comic books for 3 dollars
$1 per comic book
Distribute
3(2x-3)
6x - 9
X - 5 = 7
x = 12
3x - 4 = 8
x = 4
What is 25% of 100
25
Find the unit rate
20 chairs in 2 rows
10 Chris per row
Factor
4x + 36
4(x + 9)
3x = 18
x = 6
4x – 3 = 9
x = 3
Percent increase or decrease
50, 15
705 DECREASE
What is the constant of proportionality in the equation y=2.5x
2.5
Factor
12x - 36
12(x - 3)
x/8 =6
x = 48
3(x + 2) = 15
x = 3
Find the retail price
Original price $50, 50% mark up
$75
If 12 pencils cost $6, how much do you pay for 10 pencils?
$5
Write an algebraic expression
The quotient of 81 and x minus 15
81/x - 15
8 = -x +2
X = -6
–5 = –5(x + 1)
x = 0
How much did you pay?
Meal $50
Tax 10%
Tip 20%
$65
My car drives 20 miles in 30 minutes.
What is the speed (mph) of the car?
40 mph