Variables and Expressions
A letter that represents an unknown quantity.
What is Variable?
Terms that have the same power and variable.
What is "Like" terms?
Each side of the equality must balance.
What is how to solve equations?
2x-1=5
An equation that shows a relationship between measurable quantities.
What is a formula?
One is a combination of variables, constants and mathematical operations. The other is a statement of two quantities being of the same value.
What is the difference between expressions and equations?
To combine all "like" terms and reduce.
What is simplify?
Addition Property of Equality
Subtraction Property of Equality
Multiplication Property of Equality
Division Property of Equality
What is the four properties used to solve equations?
1/5x=-3/7
What is X=-15/7 or -21/7?
To get a variable by itself, even in a multi-variable equality.
What is 2x-7?
(2x+3)+(x-2) simplified.
What is 3x+1?
Anything I do to one side, I must do to the other.
What is summary of equality rules?
-6/7x+3/7=1/14
What is x=5/12
Solve for x
-3x+2c=-3
What is x=1+2/3c?
Evaluate the following:
a=-3, b=2, c=6
2c+ab+b2
Simplify (x2+5x-1)-(-2x2+3x+7).
What is 3x2+2x-8?
e/4=8
4*e/4=8*4
e=32
What is multiplication property of equality?
8=4(q-2)+4
Solve for a
am=n+p
What is a=(n+p)/m?
Five times a number, cubed.
What is 5x3?
Simplify 3(x2+2xy-y2+4)-2(-xy+y3-4x2+2)?
(2k-7)/3=2
3*(2k-7)/3=2*3
2k-7=6
2k-7+7=6+7
2k=13
2k/2=13/2
k=6 1/2
What is multiplication property of equality, addition property of equality, division property of equality?
The solution of -y-8+6y=-9+5y+1
What is all reals?
Solve for x.
x2+y2=r2
What is x=√(r2-y2 )?