A] David's speed during the period:
i] AB
speed=distance/time
time taken between AB=0.5 hours
distance=20 km
thus
speed=20/0.5=40 km/h
ii]BC
time taken between BC=1.5 hours
distance=20
speed=20/1.5=13 1/3 km/h
b] Average speed for the entire time will be:
average speed=(total distance)/(total time)
total distance=(20+20+20)=60 km
total time=3 hours
thus
average speed=60/3=20 km/h
c] David's distance 2 hours and 15 minutes from the starting point was:
distance=20+20+10=50 km
The answer is a) x=-4.5, y=-4.25
Answer:
789
Step-by-step explanation:
A right triangle has two shorter sides, or legs, and the longest side, opposite the right angle, which is always called the hypotenuse. ... The other leg in the right triangle is then called the adjacent side.
Hoping it helps!
