Understanding Adding and Subtracting Rational Expressions

What is the first step in adding fractions?

• Finding a common denominator

• Finding a common numerator

• Multiplying the fractions

• Dividing the fractions

What is the common denominator for the fractions 3/10 and 2/7?

• 17

• 70

• 7

• 10

How do you rename fractions after finding a common denominator?

• By adding the numerators

• By dividing the fractions

• By subtracting the numerators

• By multiplying the fractions by a disguised form of one

What is the result of adding 3/10 and 2/7?

• 41/70

• 23/70

• 43/70

• 21/70

What is the common denominator for the fractions 1/3 and 1/24?

• 3

• 24

• 8

• 72

What is the result of subtracting 1/3 from 1/24?

• 7/24

• 5/24

• Negative 5/24

• 1/24

What is the common denominator for the rational expressions 5/x and 4/(x+3)?

• x^2

• x+3

• x(x+3)

• x

What is the simplified form of the expression 5/(x) + 4/(x+3)?

• 5x + 15 / x(x+3)

• 9x + 12 / x(x+3)

• 9x + 15 / x(x+3)

• 5x + 4 / x(x+3)

What is the factored form of the numerator in the expression 9x + 15 / x(x+3)?

• 9(x + 5)

• 3(3x + 5)

• 3(x + 5)

• 3(3x + 15)

What is the common denominator for the rational expressions 7/(x-5) and 1/(x^2-25)?

• x^2-25

• x+5

• x-5

• x(x+5)(x-5)