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Ksenya-84 [330]
4 years ago
8

Michael is 17 year older than john.In 4 years,the sum of their ages will be 49.Find Michael's present age.​

Mathematics
1 answer:
grin007 [14]4 years ago
8 0
Michael's present age is 53

Step-by-step

17-4=13

John is 13

than when John will be 49

u add 4 to 49

4+49=53

so Michael is 53 because he is 4 years older :)
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Answer:

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y =  {(3i)}^{2}  - 2(3i) + 1

We simplify to get

y =  {3}^{2}  \times  {i}^{2}  - 6i + 1

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This implies that:

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Explain how to find 398 + 257 with mental math and with the standard algorithm.
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Step-by-step explanation:

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The second hand on Mr. Vidler's Alarm Clock is 6 cm long. Approximately how far does the tip travel in 5 minutes and 15 seconds?
Nitella [24]

Answer: 3.297 centimeters.

Step-by-step explanation:

First, remember that if we have a circle of radius R, and we have an arc of angle A, the length of this arc is:

L = (A/360°)*2*3.14*R

In this case, we can think on a circle of radius R = 6cm.

And the angle in this case will be an angle of 5 minutes and 15 seconds.

We know that a clock does a complete revolution in 60 minutes, then:

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First, we need to write 5 minutes and 15 seconds in minutes only.

we know that 60 seconds = 1min

then:

1 = 1min/60seconds = (1/60) min/seconds

then:

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Then:

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Now we can use the relationship:

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Then:

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Then we have A = 31.5°

Then the length of this arc (that is the distance that the tip of the tip travels in 5 minutes and 15 seconds) is:

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