Traveling with the current a certain boat went 22 km/h. Against the same current it only went 6 km/h. Find the speed of the boat in still water and the speed of the current.

Speed of boat in still water is  14 km/hr and speed of current is 8 km/hr

Step-by-step explanation:

Average speed of down stream = 22 km/h

Average speed of up stream = 6 km/hr

Consider the speed of boat in still water be  x km/hr and speed of current be  y  km/hr

As such speed of down stream would be  x + y km/hr and speed of down stream would be  x - y km/hr. i.e

x+y = 22

x-y = 6

by solving these two equation, we get

2x=28

x=14 km/hr

y=16-13

y=8 km/hr

Hence, the speed of boat in still water is  14 km/hr and speed of current is 8 km/hr

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!