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Andrews [41]
3 years ago
10

Lake Okeechobee’s water level was at sea level in April. In May, the lake’s level rose 4 inches and in June it rose 2 more inche

s. As a result of no rain, the lake’s level fell 5 inches in July and 3 more inches in August.
Select all the expressions that describe this situation.




4 – 5


4 + 2 – 5 – 3


4 + 2 – (5 – 3)


4 + 2 – (5 + 3)


4 + 2 – (– 5) – (– 3)


4 + 2 + (– 5) + (– 3)
Mathematics
1 answer:
Mice21 [21]3 years ago
7 0

Answer:

Just here for points XD.

Step-by-step explanation:

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Suppose that we will randomly select a sample of 106 measurements from a population having a mean equal to 19 and a standard dev
svet-max [94.6K]

Answer:

z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809

And if we use the normal standard distribution or excel we got:

P(z

Step-by-step explanation:

For this case we have the following info given:

\mu = 19 represent the mean

\sigma = 7 represent the standard deviation

n = 106 represent the sample size

The distribution for the sample size if we use the central limit theorem (n>30) is given by:

\bar X \sim N(\mu , \frac{\sigma}{\sqrt{n}})

And for this case we want to find the following probability:

P(\bar X< 18.45)

And for this case we can use the z score formula given by:

z =\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}

And replacing we got:

z =\frac{18.45-19}{\frac{7}{\sqrt{106}}}= -0.809

And if we use the normal standard distribution or excel we got:

P(z

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3 years ago
A line of best fit predicts that when x equals 30, y will equal 34.215, but y actually equals 32. What is the residual in this c
Katarina [22]

Answer: A. - 2.215

Step-by-step explanation:

• A residual is the difference between the actual value and the predicted value in a regression model. It represents the vertical distance from the actual point to the point on the regression line.

\text{Residual=Actual value of y -predicted value of y}\\\\\Rightarrow\text{Residual}=32-34.215\\\\\Rightarrow\text{Residual}=-2.215

Hence, the residual in this case = -2.215

4 0
3 years ago
Which best explains why the equation 3x + 8 = 3x - 5 has no solutions?
Bas_tet [7]
The best answer for the question is C - The equation is not true for any value of x.

The reason for this is if we subtract 3x from both sides, there are no variables left. since there are no variables left, we know since first grade that 8 does not equal to -5....with that being true, there is no value we can assign to x to make this a true statement.
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3 years ago
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Inessa [10]
Divide the volume value by 1000, which is 0.194 .
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3 years ago
PLEASE HELP!!
tekilochka [14]

-5-12=-17 so it is b)

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3 years ago
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