Tìm hàm phần thực và hàm phần ảo của hàm phức f(z)= z^2+3iz

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

What makes a trapezoid an isosceles trapezoid?