3 years ago

7(x+4) for x=5please answer asapdon't answer if you absulutly don't know

1 answer:

3 0

So plug in the 5 for x. it would look like 7(5+4). you do PEMDAS and then looks like 7(9) and 7 multiplied by 9 equals 63.

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Factorise fully 6x^2 + 12x

sweet-ann [11.9K]

Answer:

6x(x+2)

Step-by-step explanation:

Factor 6x out of 6x^2+12x

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2 years ago

Given that cos(theta) = 8/17 and that theta lies in Quadrant IV, what is the exact value of sin 2(theta)?

Deffense [45]

Answer: $-\frac{240}{289}$

=========================================================

Explanation:

Use the pythagorean trig identity $\sin^2(\theta)+\cos^2(\theta) = 1$ and plug in the fact that $\cos(\theta) = \frac{8}{17}\\\\$

Isolating sine leads to $\sin(\theta) = -\frac{15}{17}\\\\$ . I'm skipping the steps here, but let me know if you need to see them.

The result is negative because we're in quadrant 4, when y < 0 so it's when sine is negative.

Therefore,

$\sin(2\theta) = 2\sin(\theta)\cos(\theta)\\\\\sin(2\theta) = 2*\left(-\frac{15}{17}\right)*\left(\frac{8}{17}\right)\\\\\sin(2\theta) = -\frac{240}{289}\\\\$

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1 year ago

35.75÷3.64 please help help wanted

IrinaK [193]

the answer is 9.82. hope this helps!

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3 years ago

Which is larger, 3/10 or 0.25? A.3/10 B.0.25 C.They are equal.

erastova [34]

Answer:

A. 3/10

Step-by-step explanation:

0.25 = 2.5/10

2.5/10 < 3/10

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3 years ago

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I need help to find the x

Arada [10]

Answer:

34? (I don't know what the upper right corner says)

Step-by-step explanation:

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