Please help asap!!!! 53 points!

Mathematics

2 answers:

AfilCa [17]3 years ago

8 0

The easiest way is to graph it based upon the slope (m) and y-intercept (b), in the standard slope-intercept form: y = m (x) + b.
The line above intercepts the y-axis at y = -2, which is b. The slope (m) = rise/run = (y2-y1)/(x2-x1 ); so for the point (-4, 2) to (-6, 4) is:
(4-2)/(-6--4) = 2/(-6+4) = 2/-2 = -1.
So one form of the equation would be:
y = -1x - 2
Now the other form of an equation is point-slope: y-k = m (x-h), where the point is at (h, k)
and if we pick -5 for x (bc 5 it listed in 3 of the answers), the y at x=-5 looks like around +3
so we get: y-k = -1 (x--5)...
y-3 = -(x+5)... therefore D) is the correct answer:

expeople1 [14]3 years ago

7 0

Answer:

The easiest way is to graph it based upon the slope (m) and y-intercept (b), in the standard slope-intercept form: y = m (x) + b.

The line above intercepts the y-axis at y = -2, which is b. The slope (m) = rise/run = (y2-y1)/(x2-x1 ); so for the point (-4, 2) to (-6, 4) is:

(4-2)/(-6--4) = 2/(-6+4) = 2/-2 = -1.

So one form of the equation would be:

y = -1x - 2

Now the other form of an equation is point-slope: y-k = m (x-h), where the point is at (h, k)

and if we pick -5 for x (bc 5 it listed in 3 of the answers), the y at x=-5 looks like around +3

so we get: y-k = -1 (x--5)...

y-3 = -(x+5)... therefore D) is the correct answer:

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A two sample t-test is used to compared the means of two samples who were exposed to different scenarios and therefore, it helps us to see the difference between these two samples.

In this problem, the teacher is experimenting with a new computer-based instruction. To be able to use the two-sample t-test she would have to have two randomly assigned samples and expose each of these two samples to different scenarios (one would receive a traditional instruction and the other one would receive a computer instruction), and finally she would need to compare the scores in both samples.

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*Option A is incorrect because the students are only exposed to the lesson using a computer program and therefore they aren't exposed to different scenarios.

*Option C is incorrect because although in this case the teacher uses both traditional and computer methods, there are not two different samples and she only gets the opinion of the students which is not an exact method of getting information on the effectiveness of the computer based method.

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3 years ago

80 girls and boys have planned for a movie. They are in a ratio of 6 girls to 2 boys. How many girls are there?

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2 years ago

Read 2 more answers

A+ -12= 45 6th grade

Dmitry_Shevchenko [17]

A = 57
45 + 12 = 57
57 - (-12) = 45

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