Math 7 Substitution Practice

Front

What is substitution in algebra?

Back

Substitution in algebra is the process of replacing a variable with a number or another expression to simplify or solve an equation.

Front

How do you evaluate an expression with given values for its variables?

Back

To evaluate an expression, substitute the given values for the variables into the expression and perform the arithmetic operations.

Front

What is the value of (2p + q) when p = 4 and q = 9?

Back

17

Front

How do you calculate (2a^2 - b) when a = 4 and b = 3?

Back

First, calculate a^2 (which is 16), then multiply by 2 (resulting in 32), and finally subtract b (3) to get 29.

Front

What is the result of (3a - b) when a = 5 and b = 2?

Back

The result is 13.

Front

How do you find the value of (x^2 - y) when x = 8 and y = 5?

Back

Calculate x^2 (which is 64) and then subtract y (5) to get 59.

Front

What is the value of (2a + 4b) when a = -3 and b = 7?

Back

The value is 22.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by performing all possible operations and combining like terms.

Front

What are like terms in algebra?

Back

Like terms are terms that have the same variable raised to the same power. They can be combined by adding or subtracting their coefficients.