Answer:
x=-6 y=-1
Step-by-step explanation:
// Solve equation [2] for the variable y
[2] y = -x - 7
// Plug this in for variable y in equation [1]
[1] 3x - 2•(-x -7) = -16
[1] 5x = -30
// Solve equation [1] for the variable x
[1] 5x = - 30
[1] x = - 6
// By now we know this much :
x = -6
y = -x-7
// Use the x value to solve for y
y = -(-6)-7 = -1
Solution :
{x,y} = {-6,-1}
The discriminant is b²-4ac
when the discriminant is 0, there is only one solution.
Answer: you minus the equations you have to get the equation that you want so it all can add up to that *
Step-by-step explanation:
Answer:
10.5
Step-by-step explanation:
there are 2 middle values when you have an even number of data items so you must take their average
(10+11)/2 = 21/2 = 10.5
