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3 years ago

Which point would be the image of (-3,-9) after a reflection over the y-axis?

Mathematics

2 answers:

Lera25 [3.4K]3 years ago

6 0

It would be b (-3,9)

aleksklad [387]3 years ago

5 0

Answer:

(-3,9)

Step-by-step explanation:

The x value isnt changing
The y value becomes is additional inverse

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Factor as the product of two binomials. x^2 + 3x +2

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3 years ago

What is the exact value of arccos(−2√2) ?

Strike441 [17]

Answer:

See explanation

Step-by-step explanation:

The range of the cosine function is $-1\le \cos x\le 1$

Therefore $arc \cos (-2\sqrt{2})$ is not defined.

Assuming your question is rather $arc \cos (-\frac{\sqrt{2}}{2})$

Then $arc \cos (-\frac{\sqrt{2}}{2})=\pi-arc \cos (\frac{\sqrt{2}}{2})$ in the second quadrant.

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4 0

3 years ago

PLEASE SOMEONE HELP ME

borishaifa [10]

Answer:

use a perimeter calculator if you want to for me using a calcultor is pretty uch illegal in my head and it diesnt help e on bit and use one only if you need to thus I wouldn'tknow your answer and I can't use a calculator as I don't really need it sorry.

Step-by-step explanation:

7 0

3 years ago

A tree measured 25 1/2 feet tall. Over the next 7 1/2 years, it grew to be 63 feet tall. During the 7 1/2 years, what was the av

ANEK [815]

<h2>Greetings!</h2>

Answer:

5feet per year

Step-by-step explanation:

We need to find the distance it grew in that 7 1/2 years:

63 - 25 1/2 = 37 1/2

Now to find the average yearly growth we can divide this by 7 1/2:

37.5 ÷ 7.5 = 5

So the yearly rate of growth of the tree is 5f/y

<h2>Hope this helps!</h2>

4 0

3 years ago