Lessons 1-1 to 1-3 Review (Regs)

Front

What is the solution to the equation 2x + 3 = 2x + 5?

Back

No solution; the equation simplifies to 3 = 5, which is false.

Front

How many solutions does the equation 6x - 3 = 6x + 9 have?

Back

No solution; the equation simplifies to -3 = 9, which is false.

Front

How many minutes must Rachel use for the Cingular and Verizon plans to cost the same?

Back

100 minutes; set up the equation 40 + 0.45m = 45 + 0.40m and solve for m.

Front

What is the sum of a rational number and an irrational number?

Back

Irrational; the sum of a rational and an irrational is always irrational.

Front

Which number sets does the number √32 belong to?

Back

Irrational; √32 cannot be expressed as a fraction.

Front

What is a rational number?

Back

A number that can be expressed as a fraction a/b where a and b are integers and b ≠ 0.

Front

What is an irrational number?

Back

A number that cannot be expressed as a simple fraction; its decimal representation is non-repeating and non-terminating.

Front

What is the product of two rational numbers?

Back

Rational; the product of two rational numbers is always rational.

Front

What is the definition of a whole number?

Back

A non-negative integer, including zero (0, 1, 2, 3, ...).

Front

What is the difference between integers and whole numbers?

Back

Integers include negative numbers, while whole numbers do not.