Solving Equations
Solve:
2y=8
4
Write an Expressionfor the following verbal expression:
the sum of 200 and 5 times a number
5n + 200
x + 3 = 3 + x
Communative property
Distribute 2(x + 5)
2x + 10
Who is Ms. Goodman student teaching with?
Mr. Horn
x/4=3
12
Write an Expression for the following verbal expression:
the sum of 150 and three times a number
150 + 3n
What property is this?
2(3 + x) = 6 + 2x
Distributive property
Distribute 3(y - 2)
3y - 6
What grad school is Ms. Goodman currently attending?
University of Rochester
2t -5 =9
7
Simplify:
6/ y + 3
when y is 9
1/2
What property is this?
(x + 3) + 5 = x + (3 + 5)
Associative property
Distribute and simplify
(-3/2)(2x + 2)
-3x - 3
How far is Ms. Goodman's commute home?
(answers accepted within 5 minutes of accuracy)
45 minutes
x+x+x=15
X=5
Simplify:
3y2-6y+2+3y2+8y
6y2 +2y+2
Why can't the associative property be used here?
(2 - 4) - 3 = 2 - (4 - 3)
The associative property only applies to addition and multiplication.
Solve
-2(x - 3) = 5
-5/2
What did Ms. Goodman major in in college
(hint: not math)
computer science
4(5y -2)=48
Y=2.8
Simplify:
(1/2)x + (3/4) x + 3x
(4 1/4)x or (17/4)x
Find the error here:
-2(x - 3) + 4 = -2x -6 + 4
-2 * -3 = 6
What's the issue with the following work?
-3(-x - 2) = -4(x + 3)
3x - 6 = -4x - 3
3x = -4x + 3
7x = 3
x = 3/7
-3 * -2 = 6, not -6!
What state did Ms. Goodman grow up in?
Washington
(the state, not DC!)