7th grade math ASAP please
posted by Delilah .
Help please i don't understand 2, 4, and 10 quick please thanks
1.
Write the following ratio in simplest form: 32 min:36 min
8:9
8:36
32:9
128:144
2.
Marie saved $51. On Wednesday, she spent $8 of her savings. What ratio represents the portion of her total savings that she still has left?
43:8
8:51
43:51
59:51
3.
The price of 8.4 ounces of crackers is $2.42. What is the unit price? Round your answer to the nearest cent.
$0.15 per ounce
$3.47 per ounce
$28.81 per ounce
$0.29 per ounce
4.
Jonah needs to purchase 30 juice packs for his class. While shopping, Jonah discovers the following prices for comparable juice packs. Which offers the best unit price?
15 packs for $3.95
5 packs for $2.20
20 packs for $6.20
10 packs for $3.20
5.
Solve the proportion. Where necessary, round to the nearest hundredth.
8/2 = x+3/4
13
1
7
16
6.
A dozen apples cost $2.55. At this rate, how much would 8 apples cost?
$20.40
$3.83
$0.21
$1.70
7.
Use cross products to determine which of the following pairs of ratios cannot form a proportion. (1 point)
1/3, 3/9
2/3, 4/9
2/3, 4/6
1/3, 2/6
8.
Solve the following proportion.
2/15 = 13/x
390
1.73
2.31
97.5
10.
The scale factor for two similar rectangles is 3. If the area of the smaller rectangle is 8 m^2, what is the area of the larger rectangle? (1 point)
24m^2
192m^2
72m^2
108m^2
My answers:
1. 8:9
2. ?????
3. 0.29 per ounce
4. ????
5. 13
6. $1.70
7. 2/3, 4/9
8. 97.5
10. ??????
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