3 years ago

Which of the following points is in the solution set of y < x^2-2x-8

Mathematics

2 answers:

nasty-shy [4]3 years ago

7 0

Answer:

y < (x - 4)(x + 2)

so the critical points are -2 and 4

(-2,-1) will be in the solution

( 0,-2) will not

(4,0) will not.

the answer is ((-2,-1)

Step-by-step explanation:

enot [183]3 years ago

3 0

Answer:

y < (x - 4)(x + 2)

so the critical points are -2 and 4

(-2,-1) will be in the solution

( 0,-2) will not

(4,0) will not.

the answer is ((-2,-1)

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Solve a triangle when A=15° B=113° and b=7?

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Let us draw a triangle ABC with A=15° ,B=113° and b=7.

Please see the attached image.

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$A+B+C=180\\
\\
15+113+C= 180\\
\\
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$\frac{a}{\sin 15}= \frac{7}{\sin 113}\\
\\
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\\
a=1.97\\
\\
\text{Again apply sine rule, we get}\\
\\
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\\
c=\frac{7 \sin 62}{\sin 113}\\
\\
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3 years ago

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