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nikdorinn [45]
3 years ago
11

Please help with these questions please

Mathematics
2 answers:
pentagon [3]3 years ago
8 0

Answer:

7. adjacent

8.127°

Step-by-step explanation:

adjacent angles on a straight line add up to 180°

180-53=127°

xeze [42]3 years ago
8 0

Answer:

they are supplementary

x = 127

Step-by-step explanation:

supplementary angles equal 180 degrees so you would do: 180 - 53 to find x

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Root 3 cosec140° - sec140°=4<br>prove that<br><br>​
Lorico [155]

Answer:

Step-by-step explanation:

We are to show that \sqrt{3} cosec140^{0} - sec140^{0} = 4\\

<u>Proof:</u>

From trigonometry identity;

cosec \theta = \frac{1}{sin\theta} \\sec\theta = \frac{1}{cos\theta}

\sqrt{3} cosec140^{0} - sec140^{0} \\= \frac{\sqrt{3} }{sin140} - \frac{1}{cos140} \\= \frac{\sqrt{3}cos140-sin140 }{sin140cos140} \\

From trigonometry, 2sinAcosA = Sin2A

= \frac{\sqrt{3}cos140-sin140 }{sin140cos140} \\\\=  \frac{\sqrt{3}cos140-sin140 }{sin280/2}\\=  \frac{4(\sqrt{3}/2cos140-1/2sin140) }{2sin280}\\\\= \frac{4(\sqrt{3}/2cos140-1/2sin140) }{sin280}\\since sin420 = \sqrt{3}/2 \ and \ cos420 = 1/2  \\ then\\\frac{4(sin420cos140-cos420sin140) }{sin280}

Also note that sin(B-C) = sinBcosC - cosBsinC

sin420cos140 - cos420sin140 = sin(420-140)

The resulting equation becomes;

\frac{4(sin(420-140)) }{sin280}

= \frac{4sin280}{sin280}\\ = 4 \ Proved!

3 0
3 years ago
I WILL GIVE YOU BRAINLESEST IF YOU GET IT CORRECTT PLEASEEEEE
never [62]

Answer:

a. 7/8

Because 7/8 is 7 divided by 8

Plz mark brainliest

7 0
2 years ago
Read 2 more answers
A worker earns $100 every 8 hours. At this rate, how much will the worker earn in 36 hours?
patriot [66]

Answer:

The answer is $350

Step-by-step explanation:

00 = 8 hours


28/8 = 3.5


3.5(100) = 350


The worker would earn $350 in 28 hours

5 0
3 years ago
Read 2 more answers
3. Label the matrix according to the dimensions. *
Lelechka [254]
Add a picture please
8 0
3 years ago
a corn vendor at a farmers market was selling a bag of 8 ears of corn for $2.56 anithert vendor was selling a bad of 12 for 4.32
maria [59]

Answer:

8 for 2.56

Step-by-step explanation:

THE ANSWER IS IN CENTS.

2.56 ÷ 8 = 0.32 per ear

4.23 ÷ 12 = 0.36 per ear

3 0
2 years ago
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