(-7+7i)-(-7-3i)+(-7-8i) i need help

Step-by-step explanation:

(-7 + 7i) - (-7 -3i) + (-7 - 8i) = -7 + 7i -7*(-1) -3i*(-i) - 7 - 8i

                  = -7 + 7i + 7 + 3i - 7 - 8i

                   = -7+ 7 - 7 + 7i +3i - 8i

Combine like terms

                  =  - 7 + 2i

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.