7th Grade Math PSSA Review

Front

What is the formula for the area of a trapezoid?

Back

The area of a trapezoid is given by the formula: \( A = \frac{1}{2} (b_1 + b_2) h \), where \( b_1 \) and \( b_2 \) are the lengths of the two bases and \( h \) is the height.

Front

What does it mean for a number to satisfy an inequality?

Back

A number satisfies an inequality if it makes the inequality true when substituted for the variable.

Front

How do you solve the inequality 2x - 2 < 4?

Back

To solve, add 2 to both sides: 2x < 6. Then divide by 2: x < 3.

Front

What is an equivalent expression?

Back

An equivalent expression is one that has the same value as another expression for all values of the variable.

Front

How do you simplify the expression 3(–2x – 1)?

Back

Distribute the 3: 3 * -2x + 3 * -1 = -6x - 3.

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the probability of rolling a number less than 3 on a die?

Back

There are 2 favorable outcomes (1 and 2) out of 6 possible outcomes, so the probability is \( \frac{2}{6} = \frac{1}{3} \).

Front

What is the value of an expression?

Back

The value of an expression is the result obtained after performing all operations in the expression.

Front

What is the first step in solving an equation?

Back

The first step is to isolate the variable on one side of the equation.

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.