Pls help me this is for my final text and I’m struggling really bad!!!

Mathematics

1 answer:

vodka [1.7K]3 years ago

5 0

I’m not so sure I fully understand the question. But I would say the rate is 1.

I say this because the line on your graph is a y=mx+b equation.

For every unit it moves over on the X axis it moves the same unit on the Y axis.

I hope this helps.

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3 years ago

Aaron and Maria collected shells one morning at the beach. Maria had 3 times as many as Aaron, but they would have had the same

Hoochie [10]

Let the amount of shells collected by Aaron be $x$ and the amount of shells collected by Maria be $y$ respectively. Then the following system of equations should be solved:
$\left \{ {{3x=y} \atop {x+8=y-6}} \right.$

First of all, express $y$ out of first equation:
$y=3x$

Then, replace $y$ in second equation with found expression and solve it:
$x+8=3x-6$
$2x=14$
$x=14/2=7$

Finally, replace $x$ in first equation with found value and solve it too:
$3*7=y$
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So, Aaron has found 7 shells while Maria has found 21.

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3 years ago

Weights of American adults are normally distributed with a mean of 180 pounds and a standard deviation of 8 pounds. What is the

ahrayia [7]

Answer:

15.87% probability that a randomly selected individual will be between 185 and 190 pounds

Step-by-step explanation:

Problems of normally distributed samples are 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:

$\mu = 180, \sigma = 8$