Sewanhaka High School
Math 8
Name:___________________________________ Per:___
H.W. #17: Ditto
DO-NOW #17:
1) Solve and check the following equation:
Mrs. Lidowsky, Principal
Mr. Long, Teacher
Date:_________________
2) Evaluate. Express the result in scientific notation.
3) Answer the following question. Show work.
Topic: Expressions and Equations
Main Idea: Solving Equations involving the null set and identities
Aim:
RECALL
NOTES
Describe in your own words what null means.
Solve: 3x + 4 = 3x
Definition:
Solve: 8(4 – 2x) = 4(3 – 5x) + 4x
Some equations have no solution. When this occurs, the
solution is the null set or empty set and is shown by the
symbol or { }.
Math 8 – LP #17 – Page 2
Recall
Notes
What if the equation had more than one
solution? Solve and Check: 4x + 2 = 4x + 2
Solve and check: 6(x – 3) + 10 = 2(3x – 4)
Drill:
Solve and Check:
1) 3(4x + 8) = 2(6x + 12)
2) 4(5x + 3) – 6x = 7(2x + 3)
3) .09g + .5 = .86
5) 2(3x + 5) = 5(2x - 4) - 4x
6) 7 +
Summary:
If time:
Solve and Check:
4) 3(6 – 4x) = -2(6x - 9)
m
3
=9