** x + 5 = 7
x = 2
** x + 5 = 9
x = 4
{2,4}
Answer:
20.25
Step-by-step explanation:
The second car will pass the first in 5 hours
We can replace the inequality with qual sign:
2x - y = 4
x + y = -1
We can combine both question
3x = 3
x = 1
Since we know x = 1, we can solve for y by plug in in either equation:
x + y = -1
1 + y =-1
y = -2
or
2x - y = 4
2(1) - y = 4
-y = 2
y = -2
So the solution of this system of equation is the coordinate (1, -2)
