Numbers are (-20,10) and (40,-50)

Mathematics

1 answer:

seropon [69]3 years ago

6 0

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Step One

Figure out the actual change.

Change = 2.78 - 2.45

Change = 0.33

Step 2

Find the % change

% Change = 0.33/2.45 * 100 = 13.5%

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$2.=c.\\\\2\sin4x\cos4x=2\sin(2\cdot4x)=2\sin8x\\\\Used:\\\sin2\alpha=2\sin\alpha\cos\alpha$

$1.=b.\\\\\csc x-\sin x=\dfrac{1}{\sin x}-\dfrac{\sin^2x}{\sin x}=\dfrac{1-\sin^2x}{\sin x}=\dfrac{\cos^2x}{\sin x}\\\\=\dfrac{\cos x\cos x}{\sin x}=\cos x\cdot\dfrac{\cos x}{\sin x}=\cos x\cot x\\\\Used:\\\csc x=\dfrac{1}{\sin x}\\\\\sin^2x+\cos^2x=1\to\cos^2x=1-\sin^2x\\\\\cot x=\dfrac{\cos x}{\sin x}$

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We can factor a 12 out of both terms. This leaves us with the expression 12(3x + 1), which is equivalent.

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4 years ago

seven years ago beths son was one third her age at the time. seven years from now he will be one half her age. how old is beth's

elixir [45]

Easy
Anwer:
15 and 17
Step by step explanation:
34-7x=2y
-13 -13
(15,17)
I hope this helps have a good day

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3 years ago

Numbers are (-20,10) and (40,-50)​

Numbers are (-20,10) and (40,-50)