Proofs

Use the associative law for addition and the distributive law to show that.... (see attached)

Complex variables proofs

see the attached file.The questions are from "Complex Variables and Applications 8edition, Brown and Churchill". Verify expression....

Complex variables

see the attached file.The questions are from "Complex Variables and Applications 8edition, Brown and Churchill". Use division to obtain the Laurent series representation...

What do confidence Intervals represent?

I need help with the following questions: What do confidence intervals represent? 2) A mayoral election race is tightly contested. In a random sample of 1,100 likely voters, 572 said that they were planning to vote for the current mayor. Based on this sample, what is your initial hunch? Would you claim with 95% conf ...continues

Costs and Total Profit

There is a fixed cost of $50,000.00 to start a production process. Once the process has begun, the variable cost per unit is $25. The revenue per unit is projected to be $45. Write an expression for total profit.

Fixed and Variable Costs

Costs can be classified into two categories, fixed and variable costs. These costs behave differently based on the level of sales volumes. Suppose we are running a restaurant and have identified certain costs along with the number of annual units sold of 1000. Item: Raw Materials (cost for hamburgers) Total Annual Cost: 650 ...continues

Find all REAL solutions to equation

Please see the attchment.

Not looking for a proof here I just want to know how to go about working this out so I understand it beter.

not sure how to go about showing abs(Re(2 + z bar + z ^3))< or = 4 when abs z < or = 1.

Graduate level Finance mathematical equation

I would like to know how to setup this problem to solve it.

Points lie on complex plane

I have a question that I'd like to have a detailed explanation. Thanks a lot. Suppose that the points z_1, z_2,..,z_n all lies on one side of a line passing through the origin. Prove that the same is true for the points 1/z_1, 1/z_2,..., 1/z_n.