Answer:
maybe it's 9 not sure though if it's wrong sorry
Answer:
Step-by-step explanation:
We have to find the system in which we can use the x and y from the given system of equations and make it hold true
From the given equations:

multiply top equation by -2 and add them

so, x = 6, y = 5
A: x-y = 2
6 - 5 = 1, so its not a
B: -2x + 2y = -2
-2(6) + 2(5) = -12 + 10 = -2
B works
just looking at C and D I can tell it doesnt work
So the answer is B
Answer:
12,464 ft
Step-by-step explanation:
I assume that the elevation of the lake is the altitude at the surface of the water.
The surface of the lake is 922 ft above the deepest point of the lake.
11,542 ft + 922 ft = 12,464 ft
14 ten thousands = 14 x ten thousand = 140,000
12 thousands = 12 x thousand = 12,000
14 ten thousands + 12 thousands = 140,000 + 12,000 = 152,000