Question

If the points ( -3 , a ) and ( b , 4 ) lie on a straight line with equation y = 4x , then the value of a+b is : (a)9 (b)-11 (c)2/5 (d)10​

Answer 1

Answer:

a=-12,b=1

Step-by-step explanation:

Since , (-3,a) lies on straight line with equation y=4x ,it must satisfy the equation.

Hence a=4(-3)=-12

I.e,a=-12.

Also ,(b,4) lies on straight line with equation y=4x ,it must satisfy the equation.

Hence,4=4b ,i.e,b=1.

Answer 2

The value of (a+b) is -11.

Option (b) is correct.

Given:

• Two points (-3,a) and (b,4) lie on a straight line y=4x.

To find:

• The value of (a+b) is:
• (a)9
• (b)-11
• (c)2/5
• (d)10

Solution:

Formula/concept to be used:

• Put the points in the equation and find the values of a and b.

Step 1:

Find the value of 'a'.

Put the point (-3,a) in the equation y=4x.

Put x=-3 and y=a

$a = 4( - 3)$

$\bf a = - 12$

Thus,

The value of a is -12.

Step 2:

Find the value of 'b'.

Put the point (b,4) in the equation y=4x.

Put x=b and y=4

$4 = 4b$

$\bf b = 1$

Thus,

The value of b is 1.

Step 3 :

Find the value of (a+b).

$a + b = - 12 + 1$

$\bf a + b = - 11$

Thus,

The value of (a+b) is -11.

Option (b) is correct.

Learn more:

1) The point (-5, m) lies on the line represent by 3x-2y=9 then the value of m

https://brainly.in/question/48394583

2) If (p,2p+1) is the solution of the linear equation 4x+3y=23. Find the value of p

https://brainly.in/question/6448079

#SPJ2