# Tutor profile: Betsey N.

## Questions

### Subject: Basic Math

What is 2.75 + .003 + .158?

An important feature with adding decimals is lining up the decimal point. It can really help to make sure the correct numbers are getting added. For this problem, write it in a vertical arrangement, Also, it can help to put an additional zero at the end of 2.75, giving it the same number of digits. 2.750 0.003 0.158 --------- 2.911

### Subject: Library and Information Science

How does one find articles for writing a report when the instructor says, "Don't use Google."

Magazine, journal, and newspaper articles are available by searching in databases produced by different companies. Libraries of all kinds purchase subscriptions to these databases to provide access to their patrons. Sometimes it is groups of libraries or even a state that will combine budgets to provide access to a larger group of people. Stop by your local public library or ask at your school or college library about what access you have to databases. Searching in databases takes practice, but your librarian will help.

### Subject: Algebra

Your landlord sends a notice that the rent is increasing 42%, so it will cost $300.00 more than it used be. How much is the rent now?

This word problem is solving for the current cost of the rent, so that is the unknown, also known as the x. We know the new rent will be $300.00 more than the current rent, so x+300. We also know the new rent will be 42% more than it is now, so 1.42x (that is, 1.42 times the current cost). These two ways of writing the new rent cost are equal, so 1.42x = x + 300. In solving an equation, what is done to one side is done to the other and the equation continues to be equal. First x is subtracted from each side: 1.42x = x + 300 -x -x --------------- .42x = 300 Do remember that x has an invisible 1 next to it. The .42x is achieved by subtracting a 1 from 1.42. Next step is division, divide each side of the equation by .42: .42x = 300 --- ---- .42 .42 x = 714 Check the math using 714 in place of x: 1.42 times 714 = 714 + 300 1013.88 = 1014 In this problem, it's a rounded up 1013.88 to 1014 to get 1014 = 1014. The math is off by a few pennies because to say 42% is also a rounded figure, $300 is actually 42.0168067226891% but for getting a notice from your landlord, the $714 rent is going up 42% by $300 to $1014.

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