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Vinil7 [7]
3 years ago
11

A math teacher is trying to analyze her test grades she surveys the students to find out how many minutes they studied she then

makes a scatter plot of time studying and test grades what is the domain?
A. the students grades on their tests
B. the number of students in class
C. the different courses the teacher teaches
D. the number of minutes the student studied
Mathematics
1 answer:
KIM [24]3 years ago
8 0
The domain would be D. The number of minutes the student studied.
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Answer:

y=-3

Step-by-step explanation:

Given Equation:  

                            9x +7y=-12\\             y=?       at    x= 1

Putting the given value of 'x' in the equation:

                            9(1) +7y=-12\\\\9+7y=-12\\\\7y=-12-9\\\\7y=-21\\\\y=-\frac{21}{7} \\y=-3

At x=1, the value of y is y=-3

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What is the greatest common factor of 18, 6, and 36?
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Answer:

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2 years ago
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umka21 [38]

Answer:

a. u=\frac{4\sqrt{41}i }{41}-\frac{5\sqrt{41}j}{41}

Step-by-step explanation:

The given vector is v= 4i - 5j

The magnitude of this vector is;

|v|=\sqrt{(-4)^2+(-5)^2}

|v|=\sqrt{16+25}

|v|=\sqrt{41}

The unit vector u in the direction of v is;

u=\frac{v}{|v|}

u=\frac{4i - 5j}{\sqrt{41}}

u=\frac{4i }{\sqrt{41}}-\frac{5j}{\sqrt{41}}

We rationalize to get

u=\frac{4\sqrt{41}i }{41}-\frac{5\sqrt{41}j}{41}

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3+5=8

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