7th Grade Math Review

7th Grade Math Review

Test Thursday-Friday

Content Review

• Proportional Relationships

• Solving Equations

• Word Problems

• Circles

• Percent

• Positive and Negative Numbers

Multiple Choice

Janet is writing a book. She writes 3 pages every 2 days. If she continues at the same pace, how long will it take her to write a 400-page book?

Which proportion could be used to solve this problem?

• $\frac{3}{x}=\frac{400}{2}$
  

• $\frac{x}{400}=\frac{3}{2}$

• $\frac{x}{2}\ =\ \frac{3}{400}$

• $\frac{3}{2}=\frac{400}{x}$

How to know which proportion?

• The ratio was 3 pages to 2 days

• pages/days

•  $\frac{3\ pages}{2\ days\ }=\frac{400\ pages}{x\ days}$  

Multiple Select

Select two points that lie on the same line through (0,0), then select an equation that describes the relationships between the coordinates x and y.

• (1 ,5)

• (1, 10)

• (2, 10)

• y = 5x

• y = x +8

For knowing what points are on the same line.

• You need to find the unit rate of each. You do y/x.

• (1,5 ) = 5

• (1 , 10) = 10

• (2, 10) = 5

• y = 5 x the unit rate is 5

• y = X + 8 the unit rate is (x +8)

• Which ones are equivalent?

Multiple Choice

Marc bought a house for x dollars. Ten years later the house was worth 1.18x dollars. Which is another way to describe the change in the value of Marc's house?

• 118% increase

• 1.18 % increase

• 18% increase

• 0.18% increase

1.18x

• The questions is just wanting to see if you can take the decimal and write it as a percent

• move the decimal to the right twice to turn into percent. That is your answer

• 1.18 = 118%

Multiple Choice

What is x ?

3.3x + 3.0 = 16.2

• 5.82

• 9.9

• 4

• 1.64

Multiple Choice

What is the approximate difference in circumference if the radius of a 4cm circle is change to 5cm?

(Hint: Multi-step problem)

• 1 cm

• 3.14 cm

• 6.28 cm

• 2 cm

What is the approximate difference in circumference if the radius of a 4cm circle is change to 5cm?

• Your first step to this problem is to find the Circumference of both circles

• After you have found the circumference of both circles you subtract them to find the difference.

25 - (-9)

The double negatives make 9 are positive: 25 + 9 = 34

Any Questions?

Good Luck. You can use your notes on test tomorrow.

1/2 Day Wednesday

I have a biopsy at 12pm and will not be available until Thursday.

Work on your Muscular System notes in Science.