The solution to the system of equations are (2, 5).
Solution:
The system of equations are
x + y = 7 – – – – (1)
2x – y = –1 – – – – (2)
To find x from equation (1):
x + y = 7
Subtract y from both sides of the equation, we get
⇒ x + y – y = 7 – y
⇒ x = 7 – y – – – (3)
Substitute (3) in (2) we get,
2(7 – y) – y = –1
14 – 2y – y = –1
14 – 3y = –1
Subtract 14 from both sides,
–3y = –15
Divide by –5 on both sides,
y = 5
Substitute y = 5 in equation (3)
x = 7 – 5
x = 2
The solution to the system of equations are (2, 5).
The new office should be at a distance of 37.5 miles from Jonesville.
The weighted mean is the sum of all elements in a data-set multiplied by their weights, divided by the sum of the weights. For example, if x1 and x2 are the elements with weights w1 and w2 respectively, then the weighted average is calculated using the given formula-
M = {(x1*w1) + (x2*w2)}/ (w1+w2)
Here, we are given that two cities Jonesville and Bellevue, 60 miles apart.
Let Jonesville be at point 0 and Bellevue be at point 60.
Jonesville has a weight of 3 and Bellevue has a weight of 5.
Thus, the weighted average can be calculated as follows-
Mean = {(60*5) + (0*3)}/8
= 300/8
= 75/2
= 37.5
Thus, the new office should be at a distance of 37.5 miles from Jonesville.
Learn more about weighted averages here-
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Hello
The answer is 45 people if you break down the equation you can get 60 -10 is 50 then subtract 5 to get 45 and you have your answer
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