He raised $736.
One way is to multiply 640 x .15 = 96
Add 96 + 640 = 736
Answer:
10
Step-by-step explanation:
1 tenth: 1/10
1 hundredth: 1/100
1/10 = X × 1/100
X = 100/10
X = 10
5
...........................
Step-by-step explanation:
Distance = rate × time
If B is the rate of the boat, and C is the rate of the current, then we can write two equations:
18 = (B + C) × 3
18 = (B − C) × 9
Simplifying the equations:
6 = B + C
2 = B − C
Add the equations together to eliminate C:
8 = 2B
B = 4
Plug into either equation to find C:
C = 2
The boat's rate is 4 mph, and the current's rate is 2 mph.
adding two negative integers always yields a negative sum
