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boyakko [2]
2 years ago
11

3х - 2 = 4 - x pleaseee answer this is due in 20 minutes

Mathematics
1 answer:
tamaranim1 [39]2 years ago
3 0

Step-by-step explanation:

3x-2=4-x

3x+x=4+2

4x=6

x=<u>6</u>

<u> </u><u> </u><u> </u><u> </u>4

x=<u>3</u>

<u> </u><u> </u><u> </u><u> </u>2

hope it helps.

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You are curious about the average number of yards Matthew Stafford throws for each game for the Detroit Lions. You randomly sele
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Answer:

The margin of error for this estimate is of 14.79 yards per game.

Step-by-step explanation:

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

T interval

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 = 20 - 1 = 19

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.093

The margin of error is:

M = T\frac{s}{\sqrt{n}}

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

You randomly select 20 games and see that the average yards per game is 273.7 with a standard deviation of 31.64 yards.

This means that n = 20, s = 31.61

What is the margin of error for this estimate?

M = T\frac{s}{\sqrt{n}}

M = 2.093\frac{31.61}{\sqrt{20}}

M = 14.79

The margin of error for this estimate is of 14.79 yards per game.

3 0
3 years ago
A letter in the word COURAGE is chosen at random, then a coin is tossed three times. How many outcomes are possible?
RideAnS [48]

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Step-by-step explanation:

3 0
3 years ago
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krok68 [10]

Answer:

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Step-by-step explanation:

Simplify the following:

((36/2)/(3×9))/2

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36/(3×9×2×2)

36/9 = (9×4)/9 = 4:

4/(3×2×2)

4/2 = (2×2)/2 = 2:

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2/(3×2) = 2/2×1/3 = 1/3:

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6 0
3 years ago
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a car travels along a straight road heading east for one hour, then traveling for 30 minutes on another road that leads northeas
My name is Ann [436]

Answer:

55.96 miles

Step-by-step explanation:

Distance = Speed X time

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From trigonometry,

sin 45 = \frac{y}{20} ; y = 20 sin 45 ; y= 14.14 miles

cos 45 = \frac{x}{20} ; x = 20 cos 45 ; x = 14.14 miles

using Pythagoras theorem;

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