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r-ruslan [8.4K]

4 years ago

14

Which numbers are necessary to solve this problem?

2 answers:

Harman [31]4 years ago

8 0

Add, multiply then, add then divide, so A.

Bad White [126]4 years ago

5 0

Hello there.

<span>Which numbers are necessary to solve this problem?

Brian goes to the gym 3 times a week. He exercises for 45 minutes each visit. Fifteen of those minutes are spent on weights and the rest are spent on the treadmill.

How much time does Brian spend on the treadmill in 4 weeks?

Answer: </span><span>3 times a week, 45 minutes, 15 minutes, 4 weeks
</span>

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zavuch27 [327]

Answer: $EF=15cm$

Step-by-step explanation:

You know that the triangle ABC and the triangle DEF are similar.

Therefore, if the lenght of AC is 12 centimeters and the lenght of DF is 10 centimeters, then you can find the ratio as following:

$ratio=\frac{DF}{AC}\\\\ratio=\frac{10cm}{12cm}\\\\ratio=0.8333$

Then, the calculte the length of EF, you must multiply the lenght BC of the triangle ABC by the ratio obtained above.

Therefore, the lenght EF is the following:

$EF=0.8333(18cm)\\EF=15cm$

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