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3 years ago

Which point is located at (3, -1)?

Mathematics

1 answer:

denis23 [38]3 years ago

4 0

Answer:

i think its point D. So that means the answer is B. I think so because if the middle like going side to side is marked first then it must mean the positive is first and so it's point D

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Whose statement makes sense? Whose statement is nonsense?

baherus [9]

Answer:

Step-by-step explanation:

3 0

3 years ago

The GCD of two numbers is 20. The ratio of these two numbers is 2: 3. Find the sum of the two numbers.

Rainbow [258]

Answer:

225

Step-by-step explanation:

5 0

3 years ago

Whats the Area? how do i find it? In these specific questions?

just olya [345]

The formula for finding the area of a square is:
${s}^{2}$

The formula for finding the area of a triangle is:
$\frac{1}{2} bh$

So for the square the area would be:
${2x}^{2} \times {2x}^{2} = {4x}^{2}$

The area for the triangle would be:

$\frac{1}{2} {2c}^{3} \times 4c = {4c}^{2}$

7 0

3 years ago

Suppose the ages of multiple birth mothers (4 or more births) are normally distributed with a mean age of 35.5 years and a stand

Ann [662]

Answer:

40.65% of these mothers are between the ages of 32 to 40

23.27% of these mothers are less than 30 years old

37.07% of these mothers are more than 38 years old

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 35.5, \sigma = 7.5$

What percent of these mothers are between the ages of 32 to 40?

This is the pvalue of Z when X = 40 subtracted by the pvalue of Z when X = 32.

X = 40

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{40 - 35.5}{7.5}$

$Z = 0.6$

$Z = 0.6$ has a pvalue of 0.7257

X = 32

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{32 - 35.5}{7.5}$

$Z = -0.47$

$Z = -0.47$ has a pvalue of 0.3192

0.7257 - 0.3192 = 0.4065

40.65% of these mothers are between the ages of 32 to 40

What percent of these mothers are less than 30 years old?

This is the pvalue of Z when X = 30.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{30 - 35.5}{7.5}$

$Z = -0.73$

$Z = -0.73$ has a pvalue of 0.2327

23.27% of these mothers are less than 30 years old

What percent of these mothers are more than 38 years old?

This is 1 subtracted by the pvalue of Z when X = 38.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{38 - 35.5}{7.5}$

$Z = 0.33$

$Z = 0.33$ has a pvalue of 0.6293

1 - 0.6293 = 0.3707

37.07% of these mothers are more than 38 years old

5 0

3 years ago

three people alice , ben , calvin, are conversing at a taxi stand since taxis are the only ride service in this town. although t

elena-s [515]

Answer:

Alice will have to pay $13.33

Ben will have to pay $23.33

Kelvin will have to pay $43.33

Step-by-step explanation:

Given that

Alice destination is 20 miles away

Ben destination is 30 miles away

Calvin destination is 40 miles away.

For a mile, taxi costs 2 dollars.

To find:

How much each person has to pay if they share the same taxi to their respective destinations?

Solution:

For the first 20 miles, the taxi will be shared by all 3 of them.

Charges for 20 miles = 20 $\times$ 2 = $40

This $40 will be shared among all 3.

Each will pay = $\frac{40}{3} = \$13.33$

Charges for Alice = $13.33

Charges for Ben = $13.33

Charges for Calvin = $13.33

For the next 10 miles, the taxi will be shared by Ben and Calvin.

Charges for 10 miles = 10 $\times$ 2 = $20

This $20 will be shared between Ben and Calvin.

Each will pay = $\frac{20}{2} = \$10$

Charges for Alice = $13.33

Charges for Ben = $13.33 + 10 = $23.33

Charges for Calvin = $13.33 + 10 = $23.33

For the next 10 miles, Calvin travels alone.

Charges for 10 miles = 10 $\times$ 2 = $20

This $20 will be paid by Calvin alone.

Charges for Alice = $13.33

Charges for Ben = $23.33

Charges for Calvin = $23.33 + 20 = $43.33

3 0

4 years ago