3 years ago

Solve for x. 4(1 - x) + 2 x = -3(x + 1)

Mathematics

1 answer:

ra1l [238]3 years ago

5 0

The answer is. x= -7

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Find an identity for cos(4t)

s344n2d4d5 [400]

We must know that $\cos(2x)=2\cos^2(x)-1$ . So:

$\cos(4t)=\cos(2\cdot2t)\\\\
\cos(4t)=2\cos^2(2t)-1\\\\
\cos(4t)=2(2\cos^2(t)-1)^2-1\\\\
\cos(4t)=2(4\cos^4(t)-4\cos^2(t)+1)-1\\\\
\cos(4t)=8\cos^4(t)-8\cos^2(t)+2-1\\\\
\boxed{\cos(4t)=8\cos^4(t)-8\cos^2(t)+1}$

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3 years ago

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uranmaximum [27]

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Step-by-step explanation:

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3 years ago

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Nostrana [21]

He is going to have 21 nickels

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3 years ago

you need 2b cups of flour for making b loaves of bread.You have 8 cups of flour.Do you have enough for 5 loaves of bread?Explain

amm1812

No, you do not have enough flour. To solve, you would need to substitute 5 for b, and 2 * 5=10. Since you only have 8 cups of flour, you do not have enough.

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4 years ago

16(1/2x)⁴ whats the simplified expression

max2010maxim [7]

Answer:

1/x⁴

Step-by-step explanation:

=16(1/2x)⁴

=16(1/16x⁴)

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