x is partly constant and partly varies as y, when y=2,x=0 and when y=6,x=20.find x when y=3
x = ky + m
2k+m=0
6k+m=20
k=5,m=-10
x = 5y-10
5*3-10 = 5
the resistance R to the motion of a car is partly constant and partly varies as the square of the speed V. At 80km per hour the resistance is 1060N and 120km per hour, its resistance is 1460N. What will be the resistance at 140km per hour
How on earth is K = 5 , I don't get please adeola, explain
I have no idea
I am sorry for using foul language
I don't understand pls explain better
Find the difference between sands and d=120 when5=30findthe formula connecting dands
I am sorry
X is partly constant and partly varies as y when y=3,x=9andwhich y=5,x=13
10
Can't really tell
R = ks^2+m
1060 = (80*80)k+m
6400k+m = 1060 ........(i)
1460 = (120*120)k+m
14400k+m = 1460 .........(ii)
Solve i and ii simultaneously and get k and m.
At 140km/h,
R = (140*140)k+m
Substitute for k and m and get the resistance at 140km/h