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asambeis [7]
2 years ago
12

WORTH 67 PTS!! I WILL GIVE BRAIBLIEST!

Mathematics
2 answers:
Dominik [7]2 years ago
8 0

Answer:

1 3/4AN + 1/3

Step-by-step explanation:

sashaice [31]2 years ago
7 0

Answer:

7/4a + 1/3

1 3/4a + 1/3

Step-by-step explanation:

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Based on the equation 3x + 8y = 48, what is the missing value in the table?
defon

Answer:6

Step-by-step explanation:

6 0
3 years ago
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The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy
r-ruslan [8.4K]

Answer:

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 16 - 1 = 15

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7531

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7531\frac{0.78}{\sqrt{16}} = 0.34

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 23.29 - 0.34 = 22.95 mpg

The upper end of the interval is the sample mean added to M. So it is 23.29 + 0.34 = 23.63 mpg

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

7 0
2 years ago
What is the slope of (-5,3) and (7,9)
Softa [21]

Answer:

-35

___

27

Step-by-step explanation:

Start by setting up your pairs (x,y)

-5 & 7 are x

3 & 9 are y

X * X

---------- ÷

Y * Y

(-5, 7)

---------

(3, 9)

-35

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2 years ago
(-x-3)-(5x+2) I need to know the work and answer
olasank [31]

Answer:

-6x-5

Step-by-step explanation:

remove the parentheses


collect the like terms (-x and -5x, -3 and -2)


evaluate

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3 years ago
The diagonals of a trapezoid are perpendicular <br> Always <br> Sometimes <br> Never
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