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Ksenya-84 [330]
3 years ago
15

If Sophia purchases n songs for .99 cents each, write an expression for the total cost.

Mathematics
2 answers:
Alina [70]3 years ago
5 0
N x .99 = total cost
kodGreya [7K]3 years ago
3 0

Answer:

I think the answer would be n×0.99

Step-by-step explanation:

the answer will be n×0.99 because she bought for example n=7 each for 99 cents. to find the total you would have to do 7x0.99. Hope this help you

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Step-by-step explanation:

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Solution here,

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8 0
3 years ago
8. Jess walked for 45 minutes at 3 km/h and then ran for half an hour at x km/h. At the end
Law Incorporation [45]

<u>Answer:</u>

x = 7.5 km/h

<u>Step-by-step explanation:</u>

• First calculate the distance covered by walking at 3 km/h for 45 minutes ( 0.75 h):

distance = speed × time

              = 3 × 0.75

              = 2.25 km

• Therefore, she covered 2.25 km of the total journey by walking. Since she was 6 km from the starting point at the end of the entire journey, we can calculate the distance remaining, which she had to run:

distance she had to run = 6 - 2.25

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• Now we can calculate the speed of the 30 minute (0.5 h) run:

speed = distance ÷ time

           = 3.75 ÷ 0.5

           = 7.5 km/h    

This means that she ran at 7.5 km/h for half an hour.

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Step-by-step explanation:

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