Find the sum of 4x3 + 2x2 - 4x + 3 and 7x3 -4x2 + 7x + 8

  11x^3 -2x^2 +3x +11

Step-by-step explanation:

(4x^3 + 2x^2 - 4x + 3) + (7x^3 -4x^2 + 7x + 8)

= (4+7)x^3 +(2 -4)x^2 +(-4+7)x +(3 +8) . . . . add the coefficients of like terms

= 11x^3 -2x^2 +3x +11

3rd box is the answer

step-by-step explanation:

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.