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3 years ago

11

3(-5+2x) =21, 15 + 2x=21 is this distributed right?

1 answer:

hjlf3 years ago

3 0

Answer:

Step-by-step explanation:

3(-5+2x)=21

-15+6x=21 -5*3 is -15

6x=36

x=6

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89. In a drawing, a jar holds the numbers 1 to 8. If you draw three numbers to form a three-digit number (without replacement),

torisob [31]

Answer:

1: D. 1/336

Explanation:

10 x 9 x 8 = 720

There are 720 ways for them to come in first, second and third place.

2. Probability = 1/8 x 1/7 x 1/6 = 1/336

The probability is 1/336 or 0.002976.

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3 years ago

Please help please hurry

frosja888 [35]

Answer:

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Step-by-step explanation:

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2 years ago

Need help finding intervals where the function is decreasing.

umka21 [38]

$f(x)=-5x-5\sin x\implies f'(x)=-5-5\cos x$

$f$ is decreasing on some interval $(a,b)$ if $f'(x)$ for all $x\in(a,b)$ . Similarly, $f$ is increasing on $(a,b)$ if $f'(x)>0$ for all $x\in(a,b)$ .

On the domain $0\le x\le2\pi$ , we have

$-5-5\cos x=0\implies\cos x=-1\implies x=\pi$

as the only critical point. So we need to check the sign of $f'$ on two intervals, $(0,\pi)$ and $(\pi,2\pi)$ .

On $(0,\pi)$ , pick any test value. Suppose we take $x=\dfrac\pi2$ . Then $f'\left(\dfrac\pi2\right)=-5$ , so $f$ is decreasing on this interval.

On $(\pi,2\pi)$ , you'd find that $f'>0$ , so $f$ is increasing on this interval.

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2 years ago

The coordinates for a quadrilateral are (-8, -3), (-7,7), (3, 6) and (2, -4). Determine the type of quadrilateral.

Vadim26 [7]

Answer: square

Step-by-step explanation:

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2 years ago

<img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%20%5Csqrt%7Bx%7D%20%20-%202" id="TexFormula1" title="f(x) = \sqrt{x} - 2"

kipiarov [429]

Answer:

answer is 4

I hope it helped

Step-by-step explanation:

$f(x) = \sqrt{x} - 2\\$

which is basically

$0 = \sqrt{x} - 2$

$2 = \sqrt{x}$

$2^{2} = x$

$x = 4$

3 0

2 years ago