45L + 30D = 360 ...reduce by dividing by 15 = 3L + 2D = 24
65L + 35D = 470...reduce by dividing by 5 = 13L + 7D = 94
3L + 2D = 24......multiply by 7
13L + 7D = 94...multiply by -2
------------------
21L + 14D = 168 (result of multiplying by 7)
-26L - 14D = - 188 (result of multiplying by -2)
-----------------add
-5L = - 20
L = -20/-5
L = 4
3L + 2D = 24
3(4) + 2D = 24
12 + 2D = 24
2D = 24 - 12
2D = 12
D = 12/2
D = 6
so the loaves of bread (L) cost $ 4 per loaf and the buns (D) cost $ 6 per dozen
Answer:
r=8
Step-by-step explanation:
In the beginning you have to think about -3 x what = 6. It's -2. How can we get -2 from 6, we minus 8, so r = 8.
That also works in all the other equations if you want to try that out.
Statement A: The line is on a different plane from the points.
Answer:
Step-by-step explanation:
let it passes through (-1,y1) and (2,y2)