Substitution Method
1. Solve one of the equations for one of the variables.
2. Substitute in the other equation.
3. Solve the resulting equation.
4. Substitute the value of the variable found in step 3 into either of the original
equations and solve for t
Formula
Use
A = r2
Area of a circle.
r is the radius
C=2 r
Circumference of a circle.
r is the radius
A = LW
Area of a rectangle.
L is length, W is width
P = 2L + 2W
Perimeter of a rectangle.
L is length, W is width
1
A = BH
2
Area of a triangle.
B is bas
Reducing Rational Expressions to Lowest Terms
A rational expression is reduced to lowest terms when the numerator
and denominator have no common factors other than 1.
To simplify a rational expression reduce the rational expression to
lowest terms.
To
X-intercept
The x-intercept is the point where the graph of an equation crosses the x-axis. The x-intercept
can be found by substituting y=0 into the equation and solving for x.
Y-intercept
The y-intercept is the point where the graph of an equation cross
1. QUADRANT-ONE OF FOUR SECTIONS INTO WHICH THE
COORDINATE PLANE IS DIVIDED
2. INVERSE OPERATION -OPERATIONS THAT UNDO EACH
OTHER, SUCH AS ADDITION AND SUBTRACTION
3. EQUIVALENT EQUATIONS -EQUATIONS THAT HAVE
THE SAME SOLUTION
4. INEQUALITY -A STATEMENT T
Nod: the following.
Cam P. Pmcncs
Ute the properties of oypositee to complete the equation.
1) +4) =
2) -1(3 - x2) = _
Find the distance on the number line between the pair of numbers.
3) 17, -13
Evaluate the expression.
4) (-4)2
5) 64
6) 43
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15) 9y - 2x = 10 p I denim "";0';(1'§I7;I-6.
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1. Numerical expression-consists of numbers and operations
2. Evaluate -to find the value of an expression
3. Order of operations -the order in which operations in an expression to be evaluated are
carried out.
4. Variable -a letter used to represent one