Variables and Expressions
A letter that represents a number in an expression or equation
A Variable
Simplify:
5x + 9y + 3x - 2y
8x + 7y
p/11 = 6
Is 66 the solution?
Yes!
66/11 = 6
If a rectangle has an area of 42 and a height of 7, what is the width?
w = 6
What is the opposite of -109
109
A number or product of a number and a variable in an algebraic Expression
A term
Simplify:
2x + 1 - x + 6x - 1
7x
Solve for y
40 = 5y
y = 8
A triangle with an area of 40 has a height of 10. What is the length of the base?
b= 8
What is the value of | -13 |
13
Terms in an expression that can be combined
Like Terms
Simplify:
5(2y + 10)
10y + 50
Solve for h
h/7 = 101
h = 707
A Rectangular Prism has a volume of 360, a height of 20 and a width of 3. What is the length?
L = 6.
What is the value of | 86 |
86
A number that is multiplied by a variable
Coefficient
Distribute and Simplify
6(x + 2) + 4x
10x + 12
Solve for p
p - 3.7 = 4.2
p = 7.9
Terri ran for 3 hours and traveled 18 miles. How fast was she running?
r = 6 mph.
Compare using < or >
-47 __ -63
-47 > -63
A number in an expression or equation that has no variable
Constant
Distribute and Simplify:
3(x + 8) + 4(x -1)
7x + 20
Solve for x:
3x + 9 = 12x = 7
Eddie had a batting average of 0.352. He was 'at bat' 91 times. How many times did he hit?
h = 32
Compare using < or >
| -14 | __ | 11 |
| -14 | > | 11 |