2 years ago

Question 10

Mathematics

1 answer:

EleoNora [17]2 years ago

8 0

Answer: A

Explanation:

When the function is a linear, quadratic or cubic equation the domain will be all real numbers

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Change: f(x) = (x+2) (x-2) to standard form

Cerrena [4.2K]

Answer:

X^2 -4

Step-by-step explanation:

Not entirely sure but would u just expand the brackets. As this is a difference between 2 squares the answer should be correct but it not sure.

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3 years ago

Can someone please help me out here?

fenix001 [56]

1. D
2. A
3. C
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3 years ago

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If a = 7 and b = 11, what is the measure of ∠B? (round to the nearest tenth of a degree) A) 32.5° B) 39.2° C) 50.5° D) 57.5°

Ilia_Sergeevich [38]

Answer:

D) 57.5°

Step-by-step explanation:

As the question is not complete. So, let's suppose it is a right angle triangle then, we can apply Pythagoras theorem to calculate the hypotenuse or the third side.

Pythagoras Theorem = $c^{2}$ = $a^{2} + b^{2}$

a = 7 and b = 11

$a^{2}$ = 49

$b^{2}$ = 121

Plugging in the values, we will get:

$c^{2}$ = 49 + 121

$c^{2}$ = 170

c = $\sqrt{170}$

To calculate the unknown angle B, we can use law of sine.

Law of sine = $\frac{a}{sinA}$ = $\frac{b}{sinB}$ = $\frac{c}{sinC}$

So,

$\frac{c}{sinC}$ = $\frac{b}{sinB}$

$\frac{\sqrt{170} }{sin90}$ = $\frac{11}{sinB}$

Sin90 = 1

sinB = $\frac{11}{\sqrt{170} }$

B = $sin^{-1}$ ( $\frac{11}{\sqrt{170} }$ )

B = 57.5°

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3 years ago

1. Which of the following does NOT represent a whole number? 9 6.0 12/4 -12/3

Ivahew [28]

the answer is -12/3 cause it's negative

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3 years ago

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tresset_1 [31]

Answer:

7. Option D

9. Option B

10. Option C

Step-by-step explanation:

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3 years ago

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