53800
- 52000
-------------
1800
The coordinated of the preimage would be :
x = x cos θ + y sin θ
y = x sin θ + y cos θ
where
x = -4
y = 7
θ = -90
hope this helps
Your steps are to add all of the prices together and then divide by three. Your answer would be $3.50 as an average price.
You just have to plug in the value of x and y.
1) y = 2x + 10 —> y = 2(4) + 10
y = 8 + 10
y = 18
2) y = 2x - 4 —> 10 = 2x - 4
add four to both sides
14 = 2x and divide 2 by both sides and you get x = 7
You can add these fractions to get 9/12 - 2/12 ( 7/12 )
3/12 + 4/12
1/12 + 6/12
2/12 + 5/12
