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2 years ago

9

Can someone check my answers? I'm not sure I have them all right...

1 answer:

Semmy [17]2 years ago

3 0

<span>What is the y-intercept of the plane whose equation is 4x + 5y + z = 20?

(0, 4, 0)

Which equation has intercepts at X(1, 0, 0), Y(0, 1, 0), and Z(0, 0, 2)?

2x + 2y + z = 2

Which equation is equivalent to x + 3y + z = 3?

4x + 12y + 4z = 12

Which of the following points lies in the plane 3x + 2y + 4z = 12?

(4, 3,2)

Hope these answer the questions. Have a nice day.</span>

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The annual 2-mile fun-run is a traditional fund-raising event to support local arts and sciences activities. It is known that th

victus00 [196]

Answer: 0.0228

Step-by-step explanation:

Given : The mean and the standard deviation of finish times (in minutes) for this event are respectively as :-

$\mu=30\\\\\sigma=5.5$

If the distribution of finish times is approximately bell-shaped and symmetric, then it must be normally distributed.

Let X be the random variable that represents the finish times for this event.

z score : $z=\dfrac{x-\mu}{\sigma}$

$z=\dfrac{19-30}{5.5}=-2$

Now, the probability of runners who finish in under 19 minutes by using standard normal distribution table :-

$P(X$

Hence, the approximate proportion of runners who finish in under 19 minutes = 0.0228

8 0

2 years ago

Factor: 100x^2- 81

Alex17521 [72]

Answer:

Choice 'D' (10x + 9) (10x-9) is the correct answer

Step-by-step explanation:

100x^2 - 81

This is a difference of squares...

therefore = (10x + 9) (10x - 9)

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2 years ago

Which expression is a cubic polynomial?

Ilia_Sergeevich [38]

The answer is B) x^3-1 because it's the only one with the 3rd degree

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2 years ago

0.1,0.9,8.1,72.9, find the next terms

Leviafan [203]

The next term in the sequence is 656.1
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3 years ago

All the ratios that are equivalent to the ratio 12:3.

taurus [48]

Answer:

Step-by-step explanation:

12:3 = 12 divide by 3 = 4

3 divide by 3 = 1

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3 years ago