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# Isaak B.

## Hard-Science and Math Tutor

### Gibsonia, PA (15044)

40 miles
Hourly fee
\$48.00

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### Background Check Status for Isaak B.

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## Isaak's Resources

We are asked to find the value of the expression:   3xy + 2x  in the case where x = 2 and y = 3. This is a case of what I might call "numeric substition for variables".  It's a very important skill because it usually comes up at least once in many types...

The NPV of the project cost is 250000.   What is the NPV of a future return?   You have to discount the future returns because of the fact that a dollar today is going to be worth \$1.05 next year, 1*(1.05)^2 after two years, and so on.  So conversely getting a dollar...

First, notice that the series you wrote is  ∑ (-3)(n) for n ∈ [0,5]   There is a general formula for the sum of a basic geometric series that you should know or learn.   Here's a hint:  How can you simplify the product of (1-x) and a summation, for...

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(ex: algebra, chemistry)