<u><em>#1 is 6.34
</em></u>
<u><em>#2 is 27.25
</em></u>
<u><em>#3 is Gallons of gas use for work and errands is 10.
</em></u>
<u><em>#4 is 215
</em></u>
<u><em>Hope this helps</em></u>
Answer:
{x,y} = {-2,2}
Step-by-step explanation:
Solve equation [2] for the variable y
7y = 7x + 28
y = x + 4
Plug this in for variable y in equation [1]
-8x + 4•(x +4) = 24
-4x = 8
Solve equation [1] for the variable x
4x = - 8
x = - 2
By now we know this much :
x = -2
y = x+4
Use the x value to solve for y
y = (-2)+4 = 2
Solution :
{x,y} = {-2,2}
and this intersects at only one point so your answer is A
