Answer:
- 2
Step-by-step explanation:
The sum of - 4 and - 15 = - 19
Increased by 17 means to add on 17 to the above result, that is
- 19 + 17 = - 2
Answer:
59
Step-by-step explanation:
62+59= 121
180-121= 59
160 is the answer to 8x20
The speed of a boat in still water (b) is 50km/h. It takes the same time (t) for the boat to travel 10km (x) upstream as it does to travel 20km (y) downstream. Find the speed of the current.
upstream speed (u) = speed in still water (b) - stream speed (s) = b-s = 50-s
downstream speed (d) = speed in still water (b) + stream speed (s) = 50+s
time (t) = x/u = y/d
10/(50-s) = 20/(50+s)
10(50+s) = 20(50-s)
500 + 10s = 1000 - 20s
30s = 500
stream speed (s) = 500/30 = 16.6 km/h
Answer:
N times 4-1
Step-by-step explanation:
4 times number is not a squared number where you multiply- the number
by it's self and then you subtract 1
