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2 years ago

Use substitution to solve the linear system of equations.

1 answer:

3 0

I got the answer by graphing the following linear system of equations. And, finding where both lines intersect, is how you find the solution.
The solution is plotted at (-6, -8).
So, your answer is C.

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Please help me with number 40 specifically

Klio2033 [76]

Answer:

Parallelogram

Step-by-step explanation:

if you have a graphing paper and locate the points and after locating the points, connect it, you then have a parallelogram

3 0

2 years ago

If you’re ADDING same bases, then you should also ADD the exponents. <br><br> True<br> False

Arisa [49]

False when you multiply numbers you add the exponents.

6 0

2 years ago

Does the graph represent a function?

S_A_V [24]

The answer is not it is not because if you use the vertical line test it does not pass and if you plotted the coordinates then x would repeat multiple times

Hope this helps

Have a great day/night

6 0

2 years ago

Read 2 more answers

A healthcare provider monitors the number of CAT scans performed each month in each of its clinics. The most recent year of data

Rasek [7]

Answer: a. 1.981 < μ < 2.18

b. Yes.

Step-by-step explanation:

A. For this sample, we will use t-distribution because we're estimating the standard deviation, i.e., we are calculating the standard deviation, and the sample is small, n = 12.

First, we calculate mean of the sample:

$\overline{x}=\frac{\Sigma x}{n}$

$\overline{x}=\frac{2.31=2.09+...+1.97+2.02}{12}$

$\overline{x}=$ 2.08

Now, we estimate standard deviation:

$s=\sqrt{\frac{\Sigma (x-\overline{x})^{2}}{n-1} }$

$s=\sqrt{\frac{(2.31-2.08)^{2}+...+(2.02-2.08)^{2}}{11} }$

s = 0.1564

For t-score, we need to determine degree of freedom and $\frac{\alpha}{2}$ :

df = 12 - 1

df = 11

$\alpha$ = 1 - 0.95

α = 0.05

$\frac{\alpha}{2}=$ 0.025

Then, t-score is

$t_{11,0.025}$ = 2.201

The interval will be

$\overline{x}$ ± $t.\frac{s}{\sqrt{n} }$

2.08 ± $2.201\frac{0.1564}{\sqrt{12} }$

2.08 ± 0.099

The 95% two-sided CI on the mean is 1.981 < μ < 2.18.

B. We are 95% confident that the true population mean for this clinic is between 1.981 and 2.18. Since the mean number performed by all clinics has been 1.95, and this mean is less than the interval, there is evidence that this particular clinic performs more scans than the overall system average.

8 0

2 years ago

What set of reflections would carry triangle ABC onto itself?

Lelechka [254]

Answer:

it's x- axis,y- axis,x-axis

Step-by-step explanation:

hope this will help you

4 0

3 years ago