DCA 2 Review

Front

What is the equivalent expression for 2x + 2x + 7?

Back

4x + 7

Front

Which two expressions are equivalent: 9(6 + x) or 9⋅ 6 + 9 ⋅ x?

Back

9(6 + x) and 9⋅ 6 + 9 ⋅ x are equivalent.

Front

What is the prime factorization of 110?

Back

2 ⋅ 5 ⋅ 11

Front

What is the distributive property in mathematics?

Back

The distributive property states that a(b + c) = ab + ac.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators without an equality sign.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not.

Front

What does it mean for two expressions to be equivalent?

Back

Two expressions are equivalent if they have the same value for all values of their variables.