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3 years ago

Jack is framing the roof of a structure using a triangle and two exterior angles.

Mathematics

2 answers:

Ne4ueva [31]3 years ago

4 0

The answer is A and B

sergeinik [125]3 years ago

4 0

Answer:

a b

Step-by-step explanation:

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Twice a number plus eight times a second number is 19. Five times the first number plus seven times the

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A restaurant bill comes to $23.35. find the total cost if the tax is 6.25% and a 20% tip is left of the amount.

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2 years ago

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Find the range of y = 3/2 cos 4x - 1

motikmotik

Answer:

B. $-2\frac{1}{2} \leq y \leq \frac{1}{2}$

Step-by-step explanation:

The given trigonometric function is

$f(x)=\frac{3}{2}cos4x-1$ .

The amplitude of this function is $\frac{3}{2}$ , so under normal circumstances the range is supposed to be

$-\frac{3}{2} \leq y \leq \frac{3}{2}$

But the $-1$ is a downward vertical shift.

Therefore the normal boundaries of the range will shift down one unit to give the range of the transformed function.

We subtract 1 from the lower boundary to get $-\frac{3}{2}-1=-2\frac{1}{2}$

We also subtract 1 from the upper boundary to get $-frac{3}{2}-1=\frac{1}{2}$

Hence the range is

$-2\frac{1}{2} \leq y \leq \frac{1}{2}$

Also see graph

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