Chapter 7
Exponents and Radicals
Section 7.5
Adding and Subtracting Radical Expressions
MAT-160
Intermediate Algebra
Combine. Assume that all variables represent positive real numbers.
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Approximate the amount of current in amps I (amperes) drawn by an appliance in your home using
the formula
where p is power measured in watts and r is the resistance measured in
ohms. Provide an exact answer.
a. What is the current if p = 500 watts and r = 10 ohms?
b. What is the current if p = 480 watts and r = 8 ohms?
Bergen Community College
Cerullo Learning Assistance Center
201-447-7489
Chapter 7
Exponents and Radicals
Section 7.5
Adding and Subtracting Radical Expressions
MAT-160
Intermediate Algebra
Solutions
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Bergen Community College
Cerullo Learning Assistance Center
201-447-7489