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Ahat [919]
3 years ago
12

Please i need help with this. please dont scam, worth 20 points

Mathematics
1 answer:
andre [41]3 years ago
4 0

Answer:

B and D are the answers

Step-by-step explanation:

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HELP PLZZ will give brainliest <3
melisa1 [442]

Answer:

0

1

Step-by-step explanation:

First question:

You are given a side, a, and its opposite angle, A. You are also given side b. Use that in the law of sines and solve for the other angle, B.

\dfrac{a}{\sin A} = \dfrac{b}{\sin B}

\dfrac{10}{\sin 30^\circ} = \dfrac{40}{\sin B}

\dfrac{1}{0.5} = \dfrac{4}{\sin B}

\sin B = 2

The sine function can never equal 2, so there is no triangle in this case.

Answer: no triangle

Second question:

You are given a side, b, and its opposite angle, B. You are also given side c. Use that in the law of sines and solve for the other angle, C.

\dfrac{b}{\sin B} = \dfrac{c}{\sin C}

\dfrac{10}{\sin 63^\circ} = \dfrac{}{\sin C}

\sin C = \dfrac{8.9\sin 63^\circ}{10}

C = \sin^{-1} \dfrac{8.9\sin 63^\circ}{10}

C \approx 52.5^\circ

One triangle exists for sure. Now we see if there is a second one.

Now we look at the supplement of angle C.

m<C = 52.5°

supplement of angle C: m<C' = 180° - 52.5° = 127.5°

We add the measures of angles B and the supplement of angle C:

m<B + m<C' = 63° + 127.5° = 190.5°

Since the sum of the measures of these two angles is already more than 180°, the supplement of angle C cannot be an angle of the triangle.

Answer: one triangle

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4 years ago
The sum of a number t and 31
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It would be 31+t. 
Unless there's more to this question. 
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3 years ago
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Are y = 1/4 -2 and y = 1/4 + 2 parallel?
zhenek [66]

Answer:

yes because the slope is equal. so these two lines are parallel.

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3 years ago
WILL MARK BRAINLIEST <br><br> Which graph represents the solution set of -2y &gt; 7x + 4?
a_sh-v [17]

we have

----> inequality A

The solution of the inequality A is the interval ------> [-1,∞)

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The solution of the inequality B is the interval ------> (-∞,7]

The solution of the compound inequality is

[-1,∞) ∩ (-∞,7]=[-1,7]

therefore

the answer in the attached figure

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