Midterm One Review

Midterm One Review - Math 8A-010 Winter 2009 Midterm One...

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Math 8A-010 Winter 2009 Midterm One Review 1. Simplify without using negative exponents. All variables represent positive real numbers. a) 1/ 4 82 4 16 xy z    b ) () 13 22 24 6 x yx y y xy −− 2. Factor completely: a) 49 x y b ) 66 x y c) 2 12 14 15 xx 3. Perform the indicated operations and give your answers in the simplest form: a) 2 25 2 10 45 1 aa a −+ ÷ b ) 34 x x x x +− 4. Solve the following equations and then determine whether the equation is an identity, a conditional equation, or an inconsistent equation: a) 21 5 33 x x x = b ) 31 1 5 11 x x −= ++ 5. Solve the following word problems: a) How many gallons of 20% alcohol solution must be mixed with 10 gallons of 50% alcohol solution to obtain a new mixture of 30% alcohol solution? b) Rob has exactly $3.80 consisting of quarters and dimes. He has a total of 20 coins. How many quarters and how many dimes does he have? c) An airplane that travels 450 mph in still air encounters a 30-mph headwind. How long will it take for the plane to travel 1050 miles into the wind?
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This note was uploaded on 12/07/2009 for the course CHEM1A 1a taught by Professor Oka during the Spring '09 term at UC Riverside.

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Midterm One Review - Math 8A-010 Winter 2009 Midterm One...

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