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3 years ago

Find the distance between the points (9,8) and (–2,–4).

Mathematics

2 answers:

Nat2105 [25]3 years ago

6 0

Answer:

12/11

Step-by-step explanation:

y2-y1/x2-x1

(-4-8)/(-2-9)

Nastasia [14]3 years ago

6 0

Answer:

-12,-1

Step-by-step explanation:

(9,8) (-2,-4)

x,y. x²,y²

x²-x,y²-y

(-4-8),(-2-9)

-12,-11

=-12,-11

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Vladimir79 [104]

Answer:

64,512

Step-by-step explanation:

First, I multiplied 96 and 14, and I got 1,344.

Then, I multiplied 1,344 and 48, I got 64,512.

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3 years ago

What is the x-coordinate of the vertex of the parabola whose equation is y = 3x² + 9x?

saveliy_v [14]

Answer: -3/2

Step-by-step explanation:

The axis of symmetry, and thus the x-coordinate of the vertex, is given by $x=-\frac{b}{2a}$

So, the answer is $x=-\frac{9}{2(3)}=\boxed{-\frac{3}{2}}$

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1 year ago

Your boss tells you that she knows the length of the widgets your company makes is normally distributed with a mean of 25 inches

sp2606 [1]

Answer:

Mean of sampling distribution = 25 inches

Standard deviation of sampling distribution = 4 inches

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 25 inches

Standard Deviation, σ = 12 inches

Sample size, n = 9

We are given that the distribution of length of the widgets is a bell shaped distribution that is a normal distribution.

a) Mean of the sampling distribution

The best approximator for the mean of the sampling distribution is the population mean itself.

Thus, we can write:

$\bar{x} = \mu = 25\text{ inches}$

b) Standard deviation of the sampling distribution

$s = \dfrac{\sigma}{\sqrt{n}} = \dfrac{12}{\sqrt{9}} = 4\text{ inches}$

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2 years ago

Horace take a taxi uptown and the fare is $12.78 he wants to give the taxi a 10% tip if Horace gives the driver a $20 bill how m

Olegator [25]

Answer:

$5.94

Step-by-step e

12.78 + 10% (1.28) = 14.06

20.00 - 14.06 = 5.94

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OverLord2011 [107]

Answer:

Step-by-step explanation:

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