📐 Variables, Expressions, and Substitution

This quiz covers the fundamentals of using variables in mathematical expressions and substituting values to solve problems. **What you'll learn:** - Identify variables and constants in algebraic expressions - Evaluate expressions by substituting numbers for variables - Simplify expressions using the order of operations - Write expressions from word problems - Apply substitution to solve real-world situations

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Questions in this quiz

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Question 1
Which of the following is a variable?
Question 2
The expression $3x + 5$ means "three times $x$ , plus five."
Question 3
When $x = 4$ , the value of $2x + 3$ is ___.
Question 4
Which expression matches the phrase "five less than a number $n$ "?
Question 5
If $a = 2$ and $b = 3$ , then $a + 2b = 8$ .
Question 6
A ticket to a concert costs $\$ 25 $per person. If$ t$ represents the number of tickets sold, which expression shows the total revenue?
Question 7
If $y = 5$ , then $3y - 4 = ___.
Question 8
The expressions $2x + 3$ and $3 + 2x$ have the same value for any value of $x$ .
Question 9
A recipe calls for $2$ cups of flour for every $3$ eggs. If there are $e$ eggs, which expression shows how many cups of flour are needed?
Question 10
When $m = 6$ and $n = 2$ , the value of $\frac{m + n}{2} + m$ is ___.