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

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 3

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

Answer 4

I have no idea

Answer 5

I am sorry for using foul language

Answer 6

I don't understand pls explain better

Answer 7

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

Answer 8

I am sorry

Answer 9

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

Answer 10

10