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mamaluj [8]
2 years ago
5

Please help me please

Mathematics
1 answer:
zloy xaker [14]2 years ago
7 0

Answer:

they are identical. proved below.

Step-by-step explanation:

  • formula:  sin(t)+sin(s) = 2sin(\frac{t+s}{2} )cos(\frac{t-s}{2} )

using the formula to proof:

sin9a+sin5a

2sin(\frac{9+5}{2})* cos(\frac{9-5}{2})

2sin7a * cos2a

True. proved that they are identical.

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The smith family bought 10 gallons of ice cream for a party and 80% of ice cream bought was eaten how many gallons was eaten
Nadusha1986 [10]

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8 gallons were eaten.

Step-by-step explanation:

You would multiply the percentage by the amount of gallons. So 80% would be 0.8 so it would be 0.8 multiplied by 10 which gives you 8.

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3 years ago
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tensa zangetsu [6.8K]

Answer:

The answer is 3

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Never mind no one will answer it
Vinil7 [7]
What
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A line segment has endpoints at (–1, 4) and (4, 1). Which reflection will produce an image with endpoints at (–4, 1) and (–1, –4
katrin2010 [14]

Answer:- A reflection of the line segment across the line y = –x .


Explanation:-

A reflection over the line y = -x, the x-coordinate and y-coordinate interchange their places and they are negated (the signs are changed).

Given :- A line segment has endpoints at (–1, 4) and (4, 1) such that it reflects produce an image with endpoints at (–4, 1) and (–1, –4).

(-1, 4)→(-4, 1) and

(4, 1)→(-1, -4)

Thus this shows a reflection of the line segment across the line y = –x.

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3 years ago
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There are 8 performers who will present their comedy acts this weekend at a comedy club. One of the performers insists on being
Natalija [7]
Well, the keyword here is One of the performers insist on being the last.

So, the amount of performers that we can arrange freely is 7 performers.

Different ways we can schedule their appearance is :

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hope this helps
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