Question

Medal for help :) Suppose y varies directly with x and y =25 when x =140.What is the value of x when y =36?
a.140
b.165
c.201.6
d.176

Answer 1

D?

Answer 2

@am!rah

Answer 3

@midhun.madhu1987

Answer 4

this is a problem of propotions

Answer 5

Suppose y varies directly with x

when you see that you should think:
y = k x
where k is a constant you need to find

Answer 6

Ok

Answer 7

to find k, you use the info they gave you
y =25 when x =140

use those numbers in
y = k x
what do you get ?

Answer 8

Oh B

Answer 9

it's a bit silly to guess. You have to go through the steps, and the answers comes out at the end

y =25 when x =140

use those numbers in
y = k x

in other words, you get
25= k*140
divide both sides by 140 to get
25/140 = k

now you can answer your question

Answer 10

What is the value of x when y =36

y = (25/140) x
replace y with 36
36 = (25/140)x
multiply both sides by 140/25 to get
140*36/25 = x

Answer 11

is your calculator broken? what is 140*36/25?

Answer 12

Oh Ish 201.6 ty that one got me confused