Please help I am being timed on a test

Mathematics

2 answers:

4vir4ik [10]3 years ago

6 0

Answer:

15s

Step-by-step explanation:

Write like so:

54m = 9s

90m = x

Cross multiply:

(90*9)=(54x)

810 = 54x

Divide both sides by 54:

810/54 = 54x/54

15 seconds = x

balu736 [363]3 years ago

6 0

Answer:

15 seconds = x

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Answer:

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Step-by-step explanation:

The first year of depreciation is calculated by:

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This can also be written as:

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