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3 years ago

12

Find the solution set of the system of linear equations represented by the augmented matrix. (if there is no solution, enter no

solution. if the system has an infinite number of solutions, set

1 answer:

PIT_PIT [208]3 years ago

5 0

There is no system to solve for

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Jessie works at a car manufacturing plant. One day she installed a total of 46 axles, 2 in each car she worked on. She wants to

shtirl [24]

Answer:

<h2> 23 cars</h2>

Step-by-step explanation:

total number of cars: x

the total number of axles: 46

and the number of axles installed per car: 2

2 axles in each car, then total instaled axles: 2•x

2•x = 46

x = 46÷2

x = 23

5 0

3 years ago

As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage f

kondor19780726 [428]

Answer:

The 95% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

Step-by-step explanation:

Our sample size is 96.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

$df = 96-1 = 95$

Then, we need to subtract one by the confidence level $\alpha$ and divide by 2. So:

$\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025$

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 95 and 0.025 in the t-distribution table, we have $T = 1.9855$ .

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

$s = \frac{5.6}{\sqrt{96}} = 0.57$

Now, we multiply T and s

$M = T*s = 1.9855*0.57 = 1.31$

For the lower end of the interval, we subtract the mean by M. So $19.6 - 1.31 = 18.29$

For the upper end of the interval, we add the mean to M. So $19.6 + 1.31 = 20.91$

The 95% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

8 0

3 years ago

What is the 10th term in the pattern with the formula 9n + 9?

Studentka2010 [4]

A(10) = <span>9(10) + 9= 90+9 =99

---------------------------------------------</span>

6 0

3 years ago

Read 2 more answers

To predict volcanic eruptions scientists may use a seismograph to detect small earthquakes out of the 169 active volcanoes in th

UNO [17]

Answer:

39 active volcanoes.

Step-by-step explanation:

Subtract 169 (whole) from 130 (part). 9 - 0 = 9, 6 - 3 = 3, and 1 - 1 = 0. Therefore, 169 - 130 = 39

8 0

2 years ago

Read 2 more answers

Six teams are out on the field playing soccer. The teams all have the same number of players. The head coach asked for 2 players

xxMikexx [17]

$6x - 12 = 78 \\ 6x = 90 \\ x = 15$

There are 15 players on each team.

7 0

3 years ago