Simplify: 6a² - 2c + 2a² - 2c²

a. 8a² - 2c² - 2c

b. 4a² c²

c. 8a² - 4c

d. 4a² - 2c

The average time it takes a swimmer to complete a lap is represented by the variable t. Which set of numbers best describes the value of the variable?

a. integers

b. irrational numbers

c. rational numbers

d. whole numbers

Answers: a. 8a^ -2c^2 -2c

Explanation: in the algebraic expression given, group the like terms which are 6a^2 and 2a^2 and add them.

Whole numbers are positive and laps can only be positive. Laps cannot be negative.

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