$30/ 3 sweatshirts = $10 /shirt
$ 10/shirt * 4 shirts = $40
It would cost $40
Let the speed of the current be x and the speed of the canoe in still water be y, then

Adding the two equations, we have:

From any of the equations, we have that x = 2
Therefore, the speed of the current is 2 miles per hour while the speed of the canoe in still water is 5 miles per hour.
Answer:
-20
Step-by-step explanation:
-20 is greater. Since both numbers are negative, the closest number to zero is technically greater.
Answer: 
Step-by-step explanation:
Given: The weight of cement = 3 tons
The weight of bricks = 150 pounds
We know that 
Therefore, 
Now, the total weight of load in truck = 
Hence, the truck's load weigh in total = 6,150 pounds.