PSABM4ZY - Practice---Acc7.3 Lesson 12 Solving Problems about Percent Increase or Decrease (7.EE.A.2, 7.EE.B.3, 7.EE.B.4, 7.EE.B.4.a)
Assign to Canvas
Assign to Google Classroom

Select all expressions that show x increased by 35%.

 

A. D.
       
B. E.
       
C. F.  

 

 

 

 

Select all that apply:
Part A)

Here are two stories:

  • The initial freshman class at a college is 10% smaller than last year’s class. But then during the first week of classes, 20 more students enroll. There are then 830 students in the freshman class.
  • A store reduces the price of a computer by $20. Then during a 10% off sale, a customer pays $830.

 

Here are two equations:

  • 0.9x+20=830
  • 0.9(x20)=830

 

Which story is represented by 0.9x+20=830?

 

Select one:
Part B)

Which story is represented by 0.9(x20)=830?

Select one:
Part C)

Explain why one equation has parentheses and the other doesn't.

Type your answer below:
Part D)

Solve 0.920 830

 

 

x =  ____

Type your answer below as a number (example: 5, 3.1, 4 1/2, or 3/2):
Part E)

What does this solution mean in this situation?

Type your answer below:
Part F)

Solve 0.9(x-20)=830

 

Fill in the blank:

 

Round your answer to the hundredths (second) decimal place.

 

x= ____

Type your answer below as a number (example: 5, 3.1, 4 1/2, or 3/2):
Part G)

What does this solution mean in this situation?

Type your answer below:

Select all the expressions that are the result of decreasing x by 80%.

 

A.  D.
B.  E.
C.     

 

 
Select all that apply:

Which scale is equivalent to 1 cm to 1 km?

Select one:

Triangle DEF is a right triangle, and the measure of angle D is . What are the measures of the other two angles?

 

 

Enter your answer with the larger angle first and then the smaller angle, separated with a comma without spaces.

Example: 85,60. 

Type your answer below: