Answer:
x = -2, y = 7
Step-by-step explanation:
Since it's a system of equations, we know that the they use the same variables. To use substitution to solve a system of equation, we must take one equation and solve it for a variable, then you plug the solution into that variable for the other equation:
-2x + y = 11
y = 2x + 11
-------
4x + 4y = 20
4x + 4(2x + 11) = 20
4x + 8x + 44 = 20
12x + 44 = 20
12x = -24
x = -2
Then we can plug "x" into the first equation:
-2x + y = 11
-2(-2) + y = 11
4 + y = 11
y = 7
The answer is: 0.00000146 .
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Total expenses;
1/2*60=30
2/3*30=20
Total = 50
Remainder;
60-50
<span>£</span>10
Answer:
3
Step-by-step explanation:
k= y/x
k= 3/1
k= 3
3x2= 6
3x3= 9
