Column 1
Lola paid a builder x dollars per hour for a 7 hour job plus $90 for parts. The total charge was $750. Which equation can be used to determine how much the builder charged per hour?
7x + 90 = 750
Is 0.7x – 1.4 – 2.80x + 3 called an expression or an equation? Explain your choice.
Expression because it does not have an = sign
Which step would you perform first to solve for x?
-4+ 8x = -12
Add +4 on both sides
Sarah bought 8 coats that each cost the same amount and 1 pair of pants that cost $20. The items she bought cost a total of $220. What was the cost of each coat? Write an equation that represents the problem.
8x + 20 = 220
x = 25
In the expression below, 9 can best be described as a... 4x - w + 9xy - 7 + z
Coefficient
Riley is struggling with his homework and comes to you for help. He shows you the work that he has done, but he can’t get the right answer. Analyze Riley’s work to find his mistake. Then explain to Riley what his error is and show him the correct way to solve it.
2x - 6 = 24
-6 -6
2x = 18
2x/2 = 18/2
x = 9
Riley should have +6 (added) on both sides instead of subtract.
Which expression is equivalent to 9n - 15 - 6n + 5 ? Show work to support your answer.
3n - 10
Solve and Check: 32=6b-4
b = 6
It checks out!
Give me expression that is equivalent to 8x - 32?
4(2x-8)
Solve and Check: -12x+8 = 24
x = -3/4