Hello, I need answers to all odd numbered questions thank you very much

Question (5):

• group imaginary terms and real terms on different sides:

• To find value of x, Imaginary part is zero

• For Imaginary part, real part is zero:

• solving simultaneously:

Question (4):

• Group imaginary part and real part

for y:

Step-by-step explanation:

For all those miserable math lessons.....I think I can say I picked sth out of it:)

Hope that helps

v = 1/3 a^2h

step-by-step explanation:

if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.