2 years ago

Does anyone know the answer?

Mathematics

1 answer:

Vika [28.1K]2 years ago

3 0

Answer:

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Step-by-step explanation:

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Devon has $5,768 in his savings account, which is $2,709 more than Serena has in her savings account. How much money does Serena

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I got 8,477 . I hope it’s right

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Equivalent factored form for 10x^2+15x-9=2x^2+x-14

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3 years ago

Type the missing numbers

Alexxandr [17]

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-5, -2, and 0

Step-by-step explanation:

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Which of the following are identities? Check all that apply

Natasha2012 [34]

Answer:

A, C

Step-by-step explanation:

Actually, those questions require us to develop those equations to derive into trigonometrical equations so that we can unveil them or not. Doing it only two alternatives, the other ones will not result in Trigonometrical Identities.

Examining

A) True

$\frac{1-tan^{2}x}{2tanx} =\frac{1}{tan2x} \\ \frac{1-tan^{2}x}{2tanx} =\frac{1}{\frac{2tanx}{1-tan^{2}x}}\\ tan2x=\frac{1-tan^{2}x}{2tanx}$

Double angle $tan2\alpha =\frac{1 -tan^{2}\alpha }{2tan\alpha}$

B) False,

No further development towards a Trig Identity

C) True

Double Angle Sine Formula $sin2\alpha =2sin\alpha *cos\alpha$

$sin(8x)=2sin(4x)cos(4x)\\2sin(4x)cos(4x)=2sin(4x)cos(4x)$

D) False No further development towards a Trig Identity

$[sin(x)-cos(x)]^{2} =1+sin(2x)\\ sin^{2} (x)-2sin(x)cos(x)+cos^{2}x=1+2sinxcosx\\ \\sin^{2} (x)+cos^{2}x=1+4sin(x)cos(x)$

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3 years ago

Read 2 more answers

Fedor invests $3300 in an account earning 2% interest, compounded

katen-ka-za [31]

Answer:

c. $3866

Step-by-step explanation:

Put 8 where n is and do the arithmetic.

A(8) = $3300(1.02^8) = $3386

7 0

2 years ago