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galben [10]
3 years ago
12

20POINTS

Mathematics
2 answers:
Mama L [17]3 years ago
7 0

Answer:

Step-by-step explanation:

Jobisdone [24]3 years ago
4 0

Solution: The test score that the teacher should expect from a student who did not attend her course is 37.

<u>Explanation:</u>

The teacher's equation for the line of best fit is y=0.7x+37

We know the equation for the line of the best fit is:

y=bx+a

Where:

b is slope of the equation. It represents the rate of change in y as one unit change in x.

a is the intercept. It represents the expected mean value of y when all x=0.

Therefore, in the given teacher's equation, the slope is 0.7 and intercept is 37.

Here the intercept means the average score of student who who did not attend her course.

Therefore, the test score that the teacher should expect from a student who did not attend her course is 37.

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You have to find the domain and range
Dahasolnce [82]

Answer:

First off, we look for which circles are open or closed.

We start with an open interval since the circle on the left is open and end with a closed interval since the circle on the right is closed.

Domain is all x values, Range is all y values

The graph shows the continous function going from -3 to 1 on the x axis.

According to the circles, this means our domain will be (-3,1].

Now, the range doesn't care about if its closed or not. So we can say the graph is on the y axis from -4 and 0. This means the range is -4<y<0

I used different notations for both just incase you need to represent your answer differently :)

-3<x<1 & (-3,1] . Range is [-4,0]. 0>y>-4 looks correct as-well.

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3 years ago
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yanalaym [24]
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14.95 divided by 65 show your estimation and check
Serhud [2]
The answer is 0.23 or 23/100
7 0
3 years ago
Write the radian measure of each angle with the given degree measure explain your reasoning
nexus9112 [7]

Answer:

90 = π/2

45 = π/4

0 and 360 = 0 and 2π

135 = 3π/4

180 = π

225 = 5π/4

270 = 2π/3

315 = 7π/4

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Step-by-step explanation:

6 0
3 years ago
Replacement times for CD players are normally distributed
slavikrds [6]

Answer:

0.04

Step-by-step explanation:

X~N(μ=14.2; σ=0.9), a=7

P(X>7)=1-P(X\leq 7)

P(0\leq X\leq a)=P(\frac{0-\mu}{\sigma} \leq \frac{X-\mu}{\sigma}\leq \frac{a-\mu}{\sigma}), Z= \frac{X-\mu}{\sigma}=P(0\leq X\leq a)=P(\frac{0-\mu}{\sigma} \leq \frac{X-\mu}{\sigma}\leq \frac{a-\mu}{\sigma}), Z= \frac{X-\mu}{\sigma}

P(0\leq X\leq 7) = P(\frac{0-5.5}{1.5} \leq Z\leq \frac{7-5.5}{1.5}) = \Phi(1.66)-\Phi(-3.66) = \Phi(1.66) -(1-\Phi(3.66)) = 0.95-(1-0.99)=0.96

P(X>7)=1-0.96=0.04

3 0
3 years ago
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