Question

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

Answer 1

x = ky + m

2k+m=0
6k+m=20
k=5,m=-10

x = 5y-10

5*3-10 = 5

Answer 2

10

Answer 3

K=5,M=-10 Wheny=3 x=5

Answer 4

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

Answer 5

I don't know the Answer to that question

Answer 6

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

Answer 7

I have no idea

Answer 8

Can't really tell

Answer 9

I am sorry

Answer 10

I am sorry for using foul language

Answer 11

x is partly constant and partly varies as y. Express x in terms of y and constant h and k

Answer 12

How on earth is K = 5 , I don't get please adeola, explain

Answer 13

X is partly constant and partly varies as y when y=3,x=9andwhich y=5,x=13

Answer 14

I don't understand pls explain better

Answer 15

Find the difference between sands and d=120 when5=30findthe formula connecting dands