How many lines of symmetry
1 answer:
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Answer:
(x, y) = (4, 1)
Step-by-step explanation:
The coefficients of x are the same, so we can cancel the x-terms by subtracting one equation from the other. We want to do this so the resulting y-coefficient will be positive. That means we want to subtract the second equation from the first:
(-2x +y) -(-2x -4y) = (-7) -(-12)
5y = 5 . . . . . . . . simplify
y = 1 . . . . . . . . divide by 5
-2x +1 = -7 . . . . . substitute for y in the first equation
-2x = -8 . . . . . subtract 1
x = 4 . . . . . . divide by -2
The solution is (x, y) = (4, 1).
_____
A graphing calculator easily verifies the solution.
Answer:
$84
Firstly, what we must do, is establish a system of equations:
Due the circumstances, it is decided we will use the method of substitution:
↓
Now, we solve the 2-variable equation above:
Now, we must see how much money each one of them had & the price of the jacket:
Now we know that Jim had $126. In other words, $126 is of his money (total money).
So, if Jim has $126, which corresponds to of his money,
of his money is:
Hope it helped,
BiologiaMagister