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3 years ago

Find the midpoint of AB A.(-2,-3) B.(16,4) C.(-2,-11) D.(4,-10)

Mathematics

1 answer:

zheka24 [161]3 years ago

8 0

Answer:

(-2,-1)

Step-by-step explanation:

Using the graph find the coordinates for A and B.

A (-4,2) and B is (0,-4)

Midpoint formula is (x1 + x2)/2 , (y1+y2)/2

x value of the midpoint= (-4+0)/2 = -2

y value of the midpoint= (2 + -4)/2 = -2/2= -1

Midpoint is (-2, -1)

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A certain number line uses 20 spaces between consecutive integers.

noname [10]

Answer:

Distance between two consecutive tick marks is 0.05 units.

Step-by-step explanation:

We are given the following information in the question:

It is given that there are 20 ticks between two consecutive number.

Let n and n+1 be the consecutive number.

Formula:

Distance between two ticks =

$\displaystyle\frac{\text{Difeerence between the numbers}}{\text{Number of ticks}}\\\\= \frac{(n+1)-n}{20} = \frac{1}{20} = 0.05$

Thus, distance between two consecutive tick marks is 0.05 units.

5 0

2 years ago

Circle the rational numbers

MArishka [77]

Answer:

All of them are rational except for 0.0100100010001, root50, and pi

rational = no forever decimal these are the ones that arent rational

Hope this helps plz hit the crown :D

5 0

3 years ago

The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.

valina [46]

Answer:

A sample of 179 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.85}{2} = 0.075$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.075 = 0.925$ , so Z = 1.44.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

A previous study found that for an average family the variance is 1.69 gallon?

This means that $\sigma = \sqrt{1.69} = 1.3$

If they are using a 85% level of confidence, how large of a sample is required to estimate the mean usage of water?

A sample of n is needed, and n is found for M = 0.14. So

$M = z\frac{\sigma}{\sqrt{n}}$

$0.14 = 1.44\frac{1.3}{\sqrt{n}}$

$0.14\sqrt{n} = 1.44*1.3$

$\sqrt{n} = \frac{1.44*1.3}{0.14}$

$(\sqrt{n})^2 = (\frac{1.44*1.3}{0.14})^2$

$n = 178.8$

Rounding up

A sample of 179 is needed.

7 0

2 years ago

The quotient of 2 and t

tino4ka555 [31]

Answer: 2t/12

Step-by-step explanation:The quotient of is the result of dividing two terms

The first term is - Twice a number

4 0

3 years ago

The entires of the first row are

zubka84 [21]

Answer:

The answer is 3, 6.

Step-by-step explanation:

The numbers in the top rows on the left side of the equation is 1, 4 and 2, 2.

1, 4 + 1, 2 = (1 + 2), (4 + 2) = 3, 6

7 0

2 years ago