Answer:
6 mph
Step-by-step explanation:
Let x mph be the rate of the boat. Going up the river boat has the rate x-2 mph (the current decreases the rate of the boat) and going down the river boat has the rate x+2 mph (the current increases the rate of the boat). Then it will take hours to go up the river and hours to go down the river. Thus,
The rate of the boat cannot be negative, hence, x=6 mph.
Answer:
a*2+b*2+c*2+d
Step-by-step explanation:
If i's meant to be Pythagorean theorem, a*a+b*b=c*c
Answer: 6
Step-by-step explanation:
When billy turns 18 he will have $3,099.6 in his account because .021 percent x $8,200= $172.20 per year x 18 years = $3,099.60