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2 years ago

I'm really bad at math so I need some help explaining.

Mathematics

1 answer:

sergiy2304 [10]2 years ago

3 0

Please let me know if there’s something you don’t understand. Hope this helps!

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7000 litres of water is pumped out of a tank in 42 minutes. How many litres could be pumped out in one hour at the same rate?

viktelen [127]

Answer:

8600 litre×235 will be there in the tanks

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3 years ago

If a crew of 4 workers complete the job in 10 hours, how long will it take 5 workers to complete the same job?

Elanso [62]

Answer:

It will take 8 hours for the 5 workers to complete the same job.

Step-by-step explanation:

The amount of work done is the same for both crews.

Work = time * workers

Work = 10 * 4

Work = time * 5

Set the two equal

10 * 4 = time * 5

Divide each side of the equation by 5

10*4/5 = time *5/5

8 = time

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3 years ago

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How do you find the surface area of a right triangle?

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Answer:

The formula for surface area of a right triangle is A = b∙h2 where b is base and h is height.

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3 years ago

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use the pythagorean theorem to find the missing side length. 2 write sin, cosine, tangent of each angel.

Harlamova29_29 [7]

Answer:

1) $x=5\sqrt{3}$

2) $sin(a)=5\sqrt{3}/14$

$sin(b)=11/14$

$cos(a)=11/14$

$cos(b)=5\sqrt{3}/14$

$tan(a)=5\sqrt{3}/11$

$tan(b)=11/5\sqrt{3}$

Step-by-step explanation:

The Pythagorean Theorem is:

$a^{2}=b^{2}+c^{2}$

Where a is the hypotenuse and b and c are the legs.

The missing side lenght is one of the legs, then you must solve for one of them. Therefore, this is:

$x=\sqrt{(14yd)^{2}-(11yd)^{2}}=5\sqrt{3}yd$

MEASURE OF ANGLE:

Keep the identities on mind:

$sin\alpha=opposite/hypotenuse$

$cos\alpha=adjacent/hypotenuse$

$tan\alpha=opposite/adjacent$

Susbstitute values, then:

$sin(a)=5\sqrt{3}/14$

$sin(b)=11/14$

$cos(a)=11/14$

$cos(b)=5\sqrt{3}/14$

$tan(a)=5\sqrt{3}/11$

$tan(b)=11/5\sqrt{3}$

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4 years ago

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Question 17(Multiple Choice Worth 2 points)

AlexFokin [52]

Answer:
Your answer is 13.5 .

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3 years ago