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3 years ago

I need the sine of angle C

Mathematics

1 answer:

REY [17]3 years ago

5 0

A + B + C = 180°

C = 180° - A - B = 180° - 60° - 90° = 30°

sin C = sin 30° = ½

answer C)

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Clare volunteers at a local library during the summer. Her work includes putting labels on 750 books.

pentagon [3]

Answer:

How much time does it take for one book tho?

Step-by-step explanation:

If it takes two minutes for one book then it would take 1,500 minutes for all books to be labled.

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3 years ago

An object is traveling at a steady speed of 10 and one tenth km/h. How long will it take the object to travel 4 and nine tenths

My name is Ann [436]

Answer:

Estimated Answer= $\frac{1}{2} hour$

Exact Answer= $\frac{49}{101} hr$

Step-by-step explanation:

Steady speed of the object =10 and one tenth km/h = $10\frac{1}{10} km/hr$

Distance to be Covered=4 and nine tenths km = $4\frac{9}{10}$ km

To the nearest integer,

Steady speed of the object = 10 km/hr

Distance=5km

$Time Taken = \frac{Distance}{Average Speed}$

= $=\frac{5}{10} =\frac{1}{2} hr$

The estimated answer is 1/2 hr.

Next, we determine the exact answer.

$Time Taken = \frac{Distance}{Average Speed}\\ = 4\frac{9}{10} \div 10\frac{1}{10}\\=\frac{49}{10} \div \frac{101}{10}\\=\frac{49}{10} X \frac{10}{101}\\=\frac{49}{101} hr$

The exact time taken is $\frac{49}{101} hr$

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3 years ago

Solve each system by substitution.<br><br>2x-3y=6<br>x+y=-12

zzz [600]

(-6,-6)
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Im glad I can help you.

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3 years ago

Use a half-angle identity to find the exact value of sinPi/8

stellarik [79]

Answer:

sin(π/8) = (1/2)√(2-√2)

Step-by-step explanation:

Using the half-angle formula ...

$\sin{\dfrac{\theta}{2}}=\sqrt{\dfrac{1-\cos{\theta}}{2}}$

We can let θ = π/4 and simplify the result as follows:

$\sin{\dfrac{\pi}{8}}=\sqrt{\dfrac{1-\cos{(\pi/4)}}{2}}=\sqrt{\dfrac{1-\dfrac{\sqrt{2}}{2}}{2}}=\sqrt{\dfrac{2-\sqrt{2}}{4}}\\\\=\boxed{\dfrac{1}{2}\sqrt{2-\sqrt{2}}}}$

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3 years ago

Read 2 more answers

IS IT 60 CAN SOMEONE TELL DID I CLICK IT RIGHT ?

natima [27]

hi how have you been and i think u did get it right

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3 years ago