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lubasha [3.4K]
3 years ago
15

A line is drawn on a coordinate grid by the equation y = 1. Which of the following lines would represent a row perpendicular to

it?
A. a line containing the point (5,2)
B. y = 1
C. x = 4
D. y = 3
Mathematics
1 answer:
DaniilM [7]3 years ago
3 0
The answer is b I think
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Answer:

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Step-by-step explanation:

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the first group of students consists of 10 and their average age was 13 years old the next group consisted of 30 students and th
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Answer: The average was 9 years old find the average age of both groups is 10 years old.

Step-by-step explanation:

Formula foe average : \text{Average} =\dfrac{\text{Sum of all observations}}{\text{Number of observations}}

Given : The first group of students consists of 10 and their average age was 13 years old.

i.e. 13=\dfrac{\text{Sum of ages of students of first group}}{10}\\\\\Rightarrow\ \text{Sum of ages of students of first group}=13\times10=130      (1)

The next group consisted of 30 students and their average was 9 years old.

i.e. 9=\dfrac{\text{Sum of ages of students of next group}}{30}\\\\\Rightarrow\ \text{Sum of ages of students of nextgroup}=9\times30=270      (2)

Then from (1) and (2) , the sum of both groups (first group and next group )students = 130+270 =400

Combined students of both groups (first and next group )= 10+30=40

Now , the average of both groups =\dfrac{\text{Sum of combined students}}{\text{combined students}}

=\dfrac{400}{40}=10

Hence, the average was 9 years old find the average age of both groups is 10 years old.

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If an event has one outcome or a collection of outcomes , the event is a ___ event. (10 points) A.complementary B.sample space C
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Step-by-step explanation:

Not sure but that's my best guess.

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