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2 years ago

Simplify O A. y B. 76 O C. 2 OD. +2

Mathematics

2 answers:

madreJ [45]2 years ago

6 0

The answer will be t6

andrezito [222]2 years ago

4 0

Answer:

the answer is b

Step-by-step explanation:

pa brainless po 1x lng

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Prove sin^2x + cos^2x = 1

miskamm [114]

sin²x + cos²x = 1
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3 years ago

A motorboat travels 220 kilometers in 4 hours going upstream. It travels 260 kilometers going downstream in the same amount of t

aliya0001 [1]

Answer: The rate of boat is 60 kmh.

The rate of current is 5 kmh.

Step-by-step explanation:

Alright, lets get started.

Suppose the rate of boat in still water is : b kmh

Suppose the rate of current is : c kmh

When the boat is going upstream, the relative speed will be : $(b-c)$

When the boat is going downstream, the relative speed will be: $(b+c)$

Boat travels 220 kilometers in 4 hours going upstream.

$speed=\frac{distance}{time}$

$(b-c)=\frac{220}{4}$ .................. equation (1)

It travels 260 kilometers going downstream in the same amount of time.

$(b+c)=\frac{260}{4}$ ................... equation (2)

Adding equation 1 and 2

$b-c+b+c=\frac{220}{4}+\frac{260}{4}$

$2b=\frac{480}{4}$

$2b=120$

$b=60$

Plugging the value of b as 60 in equation 2

$60+c=\frac{260}{4}$

$60+c=65$

$c=5$

Hence the rate of boat is 60 kmh.

Hence the rate of current is 5 kmh.

Hope it will help :)

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3 years ago

Which of these is an example of typing an average rate of 42 words per minute

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Answer:28 words in 3/2 of a minute

Step-by-step explanation:

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