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babymother [125]
3 years ago
10

Convert 720º to radians.

Mathematics
1 answer:
Luba_88 [7]3 years ago
5 0

Answer:

720 \cdot \frac{\pi }{180} = 4\pi  = 12.56637 rad

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Calculate the quotient of 2 8 divided by 1 4 .
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2 28 divided by 14 is 2

Step-by-step explanation:

28÷14=2

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Searches related to Searches related to A motorboat travels 135 kilometers in 3 hours going upstream. It travels 183 kilometers
svetlana [45]

Answer:

\large \boxed{\sf \text{The rate of the boat is } 53 \ km/h \text{, the rate of the current is }8\ km/h \ \ }

Step-by-step explanation:

Hello, let's note v the rate of the boat and r the rate of the current. We can write the following

\dfrac{135}{v-r}=3=\dfrac{183}{v+r}

It means that

135(v+r)=183(v-r)\\\\135 v + 135r=183v-183r\\\\\text{ *** We regroup the terms in v on the right and the ones in r to the left***}\\\\(135+183)r=(183-135)v\\\\318r=48v\\\\\text{ *** We divide by 48 both sides ***}\\\\\boxed{v = \dfrac{318}{48} \cdot r= \dfrac{159}{24} \cdot r}

But we can as well use the second equation:

3(v+r)=183\\\\v+r=\dfrac{183}{3}=61\\\\\dfrac{159}{24}r+r=61\\\\\dfrac{159+24}{24}r=61\\\\\boxed{r = \dfrac{61*24}{183}=8}

and then

\boxed{v=\dfrac{159*8}{24}=53}

Hope this helps.

Do not hesitate if you need further explanation.

Thank you

5 0
3 years ago
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