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irina1246 [14]
3 years ago
15

Triangle PQR is a right triangle. If PQ = 8 , what is RQ?

Mathematics
2 answers:
slavikrds [6]3 years ago
8 0
The answer to this is B
seraphim [82]3 years ago
8 0

Answer:

The value of the RQ is 16 unit .

Option (B) is correct .

Step-by-step explanation:

Now by using the trignometric identity

cos \theta = \frac{Base}{Hypotenuse}

Base = RQ

Hypotenuse = PQ = 8 unit

\theta = 60^{\circ}

cos60^{\circ} = \frac{RQ}{PQ}

cos60^{\circ} = \frac{RQ}{8}

cos\ 60^{\circ} = \frac{1}{2}

\frac{8}{2}=RQ

RQ = 4

     = 4 unit

Therefore the value of the RQ is 4 unit .

Option (B) is correct .

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Answer:

A. 2 1/4 + 3 2/5

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Step-by-step explanation: For A: All you had to do was multiply -1(-3 2/5) and that was going to make your answer positive because the negatives were going to cancel each other out.

For B: First you had to make your fractions improper fractions instead of mixed numbers. And that would make it 9/4 + 17/5. Next, since they don't have the same denominator, you would have had to find the least common multiple of 5 and 4 which is 20. So then how ever many times your denominator went in to 20, that's what you'll multiply your numerator by. 45/20 + 68/20= 113/20

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8 0
3 years ago
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Can anyone help me with this question?
Andreyy89

Answer:

x= 60°, y = 80°, z = 40°

Step-by-step explanation:

Look at the line substending 40° and Z°; you would see that both lines are parallel and so their angles are they the same.

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