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4 years ago

Help me plz I beg you

Mathematics

1 answer:

scZoUnD [109]4 years ago

4 0

The answer would be C. We know that d is equal to the initial depth of a lake. The two given initial depths are 58 feet and 53 feet, so we know that one of the equations must be either d=58 or d=53. Because there only C has either one of those, d=58, we know that it must be the answer.

To find the other equation, it is just a linear function for the other lake. The y-intercept, or initial value, is 53, so in the equation y=mx+b, it is the b value. The slope, or m value, is 3 feet, so you have y=d=3x+53.

You might be interested in

10 x 5 thousands standard form

jeka94

Answer: $10*5,000=50,000$

Step-by-step explanation:

By definition, when you multiply two factors the result is known as "Product".

In this case you have to solve the following multiplication:

$10*5\ thousands$

The first factor is already written in Standard form, but the second one is not written in Standard form.

Then, you need to rewrite it in numbers:

$5\ thousands=5,000$

Therefore, the product is:

$10*5,000=50,000$

3 0

4 years ago

Brooke and two friends went to the movies and spent a total of $42. The movie tickets were $5 each and they each bought a popcor

Gemiola [76]

$16 for one popcorn combo.

3 0

3 years ago

Read 2 more answers

3. 8x + 4y<br>24 and 6x + 6y = 6

anzhelika [568]

Answer:

x and y

Step-by-step explanation:

Variables are always the numbers that're replaced with a letter. For example, in the equation:

2t+6

t would be the variable.

Hope this helps!! <3 :)

5 0

3 years ago

Leon is building a square picture frame. The side of the frame is 345 mm long. If a meter of wood cost seven dollars how much wi

algol [13]

345 mm is .27 meters times that by 7 and you get 2.38

7 0

4 years ago

Yoonie is a personnel manager in a large corporation. Each month she must review 16 of the employees. From past experience, she

Anarel [89]

Answer:

$P(3.25 < \bar X < 4.25)$

And we can use the z score formula given by:

$z = \frac{\bar X -\mu}{\sigma_{\bar X}}$

And using the z score we have:

$P(\frac{3.5-4}{0.3}< Z< \frac{4.25-4}{0.3}) = P(-1.667< Z< 0.833)$

And we can use the normal standard distribution table or excel in order to find the probabilities and we got:

$P(-1.667< Z< 0.833)= P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the time it takes her to complete one review, and for this case we know the distribution for X is given by:

$X \sim N(4,1.2)$

Where $\mu=4$ and $\sigma=1.2$

And we select a sample size of n =16. Since the dsitribution for X is normal then the distribution for the sample mean $\bar X$ is also normal and given by: