Basically each part of the first complex number gets multiplied by each part of the second complex number. You are multiplying 2 binomials.
(15 + 56i(7 + 4i)
= 105 + 60i + 392i + 224i^2
= 105 + 452i - 224 ( because i^2 = -1)
= - 119 + 452i
Answer:
option 3
Step-by-step explanation:
V= πr²h
to make h the subject
h= V÷πr²
just take πr² to the other side
as it in multiplication on the left hand side, it will in division in right hand side.
hope it helps!
Answer:
see the explanation
Step-by-step explanation:
Let
x ----> the number of males on the elevator
y ----> the number of females on the elevator
we know that
The inequality that represent this situation is

The solution of the inequality is the shaded area below the solid line 
The slope of the solid line is negative
The y-intercept of the solid line is (0,18)
The x-intercept of the solid line is (15,0)
see the attached figure
The solution is the triangular shaded area
The maximum number of females is 18 (when the number of males is zero)
The maximum number of males is 15 (when the number of females is zero)
Answer:
4
Step-by-step explanation:
![\huge \sqrt[4]{256} = \sqrt[4]{ {4}^{4} } = 4](https://tex.z-dn.net/?f=%20%5Chuge%20%5Csqrt%5B4%5D%7B256%7D%20%20%3D%20%20%5Csqrt%5B4%5D%7B%20%7B4%7D%5E%7B4%7D%20%7D%20%3D%204%20%20)
Z score = (x-μ)/σ
2 = (x-50) / 10; solve for x
20= x-50 and x = 70 : TRUE