Answer:
x=-8, y=3. (-8, 3).
Step-by-step explanation:
3x-5y=-39
6x+2y=-42
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-2(3x-5y)=-2(-39)
6x+2y=-42
------------------------
-6x+10y=78
6x+2y=-42
-------------------
12y=36
y=36/12=3
3x-5(3)=-39
3x-15=-39
3x=-39+15
3x=-24
x=-24/3=-8
Answer:
-2°C is the answer
Step-by-step explanation:
Hope this helps:)
Answer:
Width = 8 ft
Length = 53 ft
Height = 9 ft
Step-by-step explanation:
Let width be x
Length will be 8x-11
Height will be x + 1
Volume = width x height x length
=
x * (8x-11) * (x+1) = 3816
(8x^2 - 11x) * (x+1) = 3816
8x^3 + 8x^2 - 11x^2 - 11x = 3816
8x^3 -3x^2 - 11x = 3816
8x^3+64x^2-61x^2-488x +477x-3816= 0
8x^2 (x-8)+61x(x-8)+488(x-8)
(x-8)(8x^2 + 61x + 477) = 0
x-8
8x^2 + 61x + 477 = 0
Solve the equations:
x = 8
Length = 8x -11 = 64-11 = 53
Height = 8+1 = 9
Answer:
Download math)way it helps I swear
Step-by-step explanation:
There are possible outcomes. At the least, you can draw (1, 2, 3) to get a sum of 6, and at most (5, 6, 7) for a sum of 18. Then the PMF is
That is, consider all the possible sums and their integer partitions. For example,
6 = 1 + 2 + 3
7 = 1 + 2 + 4
8 = 1 + 2 + 5 = 1 + 3 + 4
9 = 1 + 2 + 6 = 1 + 3 + 5 = 2 + 3 + 4
and so on.
Then the expected value is
We can find the variance via