Their signs are positive. if you multiple a positive by a positive, you get a positive. but if you multiple a negative by a negative, you get a positive. if you multiply two of the same sign numbers, the product is always positive.
Answer: 
Step-by-step explanation:
Given
Truck A speed is 
Truck B speed is 
Truck A leaves 2 hours before truck B
Distance traveled in the 2 hour
Suppose Truck B will catch truck A after t hours
Overtake time is 
Answer:
Divide 250 by 9.4 to get 26.6
Step-by-step explanation:
To calculate her unit rate, 1 minute, we must divide the distance travelled over 9.4 minutes by 9.4 to see how far she travelled in 1 minute.
<span>100-6x=160-10x
100 - 160 = -10x +6x
-4x = -60
x = -60 / -4
x = 15</span>
