We will be taking a quiz tomorrow (Tuesday) in class.
Please come with a pencil, ready to write the quiz.
REVIEW
This quiz will cover 3 things
1. Distributing
To distribute you have to multiply the outside number by all the inside numbers.
Example: 2x ( 3a - 4b + 5c )
= 6ax - 8bx + 10cx
2. Factoring
To factor, you have to find a number that each part can be divided by and also take out any letter than is common to all the parts.
Example: 10ax + 25x - 15bx
= 5x ( 2a + 5 - 3b)
3. Solving for X
To solve for X you need X's on one side and numbers on the other. Do the opposite to get rid of a number in the wrong spot. At the end, divide by the number in front of the x to find out what 1x is. Remember, whatever you do to one side (of the equation) you always have to do to the other side.
Example: 3x + 4 = 13
- 4 -4
3x = 9
x = 3
Sometimes we have to cross multiply first
Example: x 4
__ = __
10 5
Multiply the diagonals (10 x 4 and X x 5)
5x = 40
x = 8
Please email me or come see me in the morning if you are confused about anything for the quiz.
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