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October 21, 2014

Homework Help: 7th grade math Ms. Sue please check

Posted by Delilah on Monday, November 5, 2012 at 10:16pm.

#1 Write the ratio in the simplest form. 30 : 6

15 : 3
6 : 6
5 : 1
2 :3


#2 Write the ratio in the simplest form.
96 : 12

1 : 8
48 : 6
32 : 4
8 : 1


#3 Solve the proportion.

x/3 = 4/6

x = 2
x = 4
x = 6
x = 8


#4 Solve the proportion.
2/y = 3/12

x = 2
x = 4
x = 6
x = 8


#5 Solve the proportion.

12/4 = x/9

x = 27
x = 3
x = 9
x = 29


#6 Find the unit rate for 255 miles in 10 hours.

0.0392 miles/hour
25.5 miles/hour
2550 miles/hour


#7 In 3 months 65.4 gallons of gas were used. Find the unit rate.

21.8 gallons/month
0.046 gallons/month
392.4 gallons/month


#8 The sides of a rectangle are increased by a scale factor of 3. The perimeter of the smaller rectangle is 15 in. What is the perimeter of the larger rectangle?

5 in.
45 in.
35 in.
15 in.


#9 The width of a picture is 30 in. Using a copy machine, you reduce the width of the picture to 2 cm. What is the scale factor of the dilation?

1 / 2
1 / 3
1 / 10
1 / 15

My answers:
1. 5:1
2. 8:1
3. x = 2
4. x = 8
5. x = 27
6. 25.5 miles/hour
7. 0.046 gallons/month
8. 45 in.
9. 1/15

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