I'm not 100% sur what it is asking but I think the expression would be
15 min. * 10 = min. till the tank is full
X=30 in the first one and x=-15 in the second one
x + y + z
- Substitute the given values for x, y, and z.
(3) + (-5) + (-2)
3 - 5 - 2
- Solve from left to right.
3 - 5 = -2
-2 - 2 = -4
<h3>Your answer is -4.</h3>