Answer:
Sum = 13+ 4i Difference = -5 - 8i
Step-by-step explanation:
Given complex number as (4 -2i) and (9 + 6i)
Sum of these complex number is
(4 -2i) + (9 + 6i) = ( 4 +9) + (6i -2i)
= 13 +4i
Difference of these complex number is
(4 -2i) - (9 + 6i) = (4 -9) - (2i +6i)
= -5 - 8i
Hence the sum and Difference of given complex numbers are
Sum = 13+ 4i Difference = -5 - 8i Answer
Minimum required sample size for a desired margin of error and confidence level when it is a proportion problem: n = (z2÷margin of error2)*p-hat*q-hat
The maximum value of p-hat*q-hat occurs where p-hat = .5 (found by taking the derivative of (p-hat)*(1-p-hat) and setting it equal to 0 to find the maximum. n = ( 2.5762( for 99% confidence interval)÷.0482 )*.5*.5 = 720.028 or 721
Answer
x= w/3y
Step-by-step explanation:
to isolate x you divide each side by 3y, which results in x= w/3y
: )
Answer:

Step-by-step explanation:
Volume of cylinder is given as
V is the volume the cylinder, r is its radius at the base, while is its height.
To select the formula for h (height) let's make h the subject of the formula as follows:
(dividing both sides of the equation by
)
Use the formula above to find the height of the given cylinder where Volume (V) = 36π cm³, and base radius (r) = 3 cm:
(substitution)
(
cancels
)

Answer:
5x² + 13x + 40 & 121
Step-by-step explanation: