9514 1404 393
Answer:
(1, 1)
Step-by-step explanation:
Did you watch the video?
The y-coefficients have opposite signs and one is a multiple of the other. It is convenient to divide the second equation by 2 and add that to the first.
(5x -2y) +1/2(4x +4y) = (3) +1/2(8)
7x = 7 . . . . simplify
x = 1 . . . . . divide by 7
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4(1) +4y = 8 . . . . substitute for x in the second equation
4y = 4 . . . . . . . . subtract 4
y = 1 . . . . . . . . . . divide by 4
The solution is (x, y) = (1, 1).
6 because it is the greatest number that both can be divided by
Answer:
45
Step-by-step explanation:
We are assuming that the pole's shadow and buildings shadow are proportional so our ratio is
x/36=1.9/1.52
cross multiply
1.52x=68.4
simplify
x=45
Answer:
-29
Step-by-step explanation:
y = 7-36
y = -29
Answer:
x = 49
The equation does have a solution
Step-by-step explanation:
The sqrt of x = 7, does have a solution. Simply remove the radical, and raise each side by the index of the radical.
In more basic terms, what number has the sqrt of 7? 7^2 is equal to 49!
