7th grade math Ms. Sue please check
posted by Delilah .
#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

7. is wrong.
8. I don't know.
9. I think there's an error in your problem.
The other answers are right.