Step-by-step explanation:
For the point (5,8) to be a solution to the equations, when you insert x=5 and y=8 , they have to equal to the given values
substituting (5,8) into 4x+y
4(5)+8
=20+8
=28
substituting(5,8) into x-y=3
5-8
= -3
1 gallon is equal to 4 quarts.
So you can either get 2 quarts for $3, or 4 quarts for 3$
1 gallon is the better deal.
You flip the sign from > to < only when you are dividing by a negative number and in this case it would be negative 9.
Parallel = same slope
y = -2/3x + b
Plug in point
15 = -2/3(-3) + b
15 = 2 + b, b = 13
Solution: y = -2/3x + 13
