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jeyben [28]
4 years ago
11

As a bowling instructor, you calculate your students' averages during tournaments. In 5 games, one bowler had the following scor

es: 143, 156, 172, 133, and 167. What was that bowler's average?
Mathematics
1 answer:
erastovalidia [21]4 years ago
4 0

Answer:

154.2

Step-by-step explanation:

143 plus

156 plus

172 plus

133 plus

167 = 771

divide by 5 equals 154.2

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Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5​
Bond [772]

Answer:

The solution to the equation system given is:

  • <u>x = 2</u>
  • <u>y = -1</u>

Step-by-step explanation:

First, we must know the equations given:

  1. 2x + 3y = 1
  2. 3x + y = 5​

Following Crammer's Rule, we have the matrix form:

\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]

Now we solve using the determinants:

x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2

y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1

Now, we can find the answer which is x= 2 and y= -1, we can replace these values in the equation to confirm the results are right, with the first equation:

  • 2x + 3y = 1
  • 2(2) + 3(-1)= 1
  • 4 - 3 = 1
  • 1 = 1

And, with the second equation:

  • 3x + y = 5​
  • 3(2) + (-1) = 5
  • 6 - 1 = 5
  • 5 = 5

 

4 0
3 years ago
Name the property illustrated by each statement:
aniked [119]

both are correct.

....

8 0
3 years ago
water stations will be placed every 600 meters of a fifteen kilometer race. how many water stations will be needed?
Snezhnost [94]
1km=1000metres
15km=15000 metres 
15000/600=25
25-1=24 (minus the last one)

hope this helps :)
5 0
3 years ago
Read 2 more answers
One hundred dollars less<br> than twice last year's<br> income?
Andrei [34K]

Answer:

2y - 100

Step-by-step explanation:

Last year's income = y

2y-100

7 0
1 year ago
Find the value of k so that the line passing through the given points has slope m
masha68 [24]
The first one is k=2 and the second answer is 0 so basically all you doing is adding the equations
6 0
3 years ago
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