1. Noah says that 9x - 2x + 4x is equivalent to 3x, because the subtraction sign tells us to subtract everything that comes after 9x.
Elena says taht 9x - 2x + 4x is equivalent to 11x because the subtraction only applies to 2x.
Do you agree with either of them?
1 point
1
Question 2
2.
2. Identify the error in generating an expression equivalent to
Then, correct the error in the space provided.
3 points
3
Question 3
3.
3. Select ALL expressions that are equivalent to
5x - 15 - 20x + 10
1 point
1
Question 4
4.
4. The school marching band has a budget of up to $750 to cover 15 new uniforms and competition fees that total $300. How much can they spend for one uniform?
a) Write an inequality to represent this situation.
**Reminder: Inequalities use the following symbols instead of = signs: <, >, ≤, ≥.
1 point
1
Question 5
5.
4b. Solve the inequality, graph the solution, and describe what your answer means.
1 point
1
Question 6
6.
5. Solve the inequality that represents each story. Then interpret what the solution means in the story.
a) For every $9 that Elena earns, she gives x dollars to charity. This happens 7 times this month. Elena wants to be sure she keeps at least $42 from this month's earnings.
7(9 - x) ≥ 42
1 point
1
Question 7
7.
5. Solve the inequality that represents each story. Then interpret what the solution means in the story.
b) Lin buys a candle that is 9 inches tall and burns down x inches per minute. She wants to let the candle burn for 7 minutes until it is less than 6 inches tall. 9 - 7x < 6
2 points
2
Question 8
8.
6. A certain shade of blue paint is made by mixing 1 & 1/2 quarts of blue paint with 5 quarts of white paint. If you need a total of 16.25 gallons of this shade of blue paint, how much of each color should you mix?
You should mix _______ quarts of blue paint with
_______ quarts of white paint.
1 point
1
Question 9
9.
Exit Ticket
Select ALL expressions that are equivalent to:
16x - 12 - 24x + 4
Show or explain your reasoning in the space provided.
