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lara31 [8.8K]
3 years ago
10

Plz can someone help me im really stuck​

Mathematics
1 answer:
frez [133]3 years ago
6 0

Answer:

a. y = -x + 2

b. (2,1)

Step-by-step explanation:

a. Looking at the graph, we can see that the slope is negative

this is because what we have is a falling graph

secondly, the y-intercept is positive

So the correct equation would be a negative value for slope and positive value for y-intercept

so;

y = -x + 2 can be correct

option D

b) What we simply have to do is to make a substitution

Let us look at the point (2,1)

we have x= 2 and y = 1

Thus,

3(1) = 2(2) - 1

3 = 4-1

3 = 3

That means that the point (2,1) lie on the line

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Question lastttttttt..............
leonid [27]

Answer:

Answer is c

Step-by-step explanation:

Solve for x

To solve for x, set the left hand side equal to 0 and solve for x with the quad equation

5 0
4 years ago
If you want to construct a 90% confidence interval, what critical value (z*) should you use? Group of answer choices 2.576 1.960
Rom4ik [11]

Answer:

For this case we know that the confidence level is 90% so then the significance level is \alpha=1-0.9 =0.1 and \alpha/2 =0.05. And we can find in the normal standard distribution a value who accumulates 0.5 of the area on each tail and we got:

z_{\alpha/2}= \pm 1.645

And the best option would be:

1.645

Step-by-step explanation:

We assume that the parameter of interest is \theta and we can assume that the distribution for this parameter is normally distributed so then the confidence interval assuming a two sided interval is given by:

\hat \theta \pm z_{\alpha/2} SE

Where \hat \theta represent the estimator for the parameter, SE the standard error and z_{\alpha/2} the critical value.

For this case we know that the confidence level is 90% so then the significance level is \alpha=1-0.9 =0.1 and \alpha/2 =0.05. And we can find in the normal standard distribution a value who accumulates 0.5 of the area on each tail and we got:

z_{\alpha/2}= \pm 1.645

And the best option would be:

1.645

6 0
3 years ago
What are the roots of the equation 2x^2+7x-3?
diamong [38]
Using Quadratic formula,
x = 0.386, -3.886
6 0
3 years ago
Tell if the slope is positive, negative, zero, or no slope.
kifflom [539]
The slope is zero
Hope it helped
4 0
3 years ago
Read 2 more answers
WILL GIVE BRAINLIEST!
wel
D, E and F will lie on the line
6 0
3 years ago
Read 2 more answers
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