Question

let y varies directly us 2x+1 .if y=12 when x=3/2 then write a linear equation what is then value of y when x=7 ?
pls solve this problem I mark you brainlist​

Answer 1

Answer:

The required linear equation is y=6x+3

when x=7, y=45

Step-by-step explanation:

Given:

y varies directly with 2x+1

$\implies\:y=k(2x+1)$

when x=3/2, y=12

$12=k(2(\frac{3}{2})+1)$

$12=k(3+1)$

$12=4k$

$4k=12$

$\implies\:k=3$

$\therefore\:y=3(2x+1)$

$\bold{y=6x+3}$

This is the required equation connecting x and y

when x=7,

y=6(7)+3

y=42+3

y=45