Worksheet Worksheet 3
1.
Determine the value of the expression \(x - y^2\) when \(x = 2\) and \(y = -3\text{.}\) Show the calculation and write your result as an if-then statement.
2.
Solve the equation \(-3a + 4b - 7 = 5\) for when \(b = -2\text{.}\) Use a complete presentation.
3.
Check the presentation for errors. If you find one, circle it and describe the mistake in words.
\begin{equation*}
\begin{aligned}
-3p + 4q \amp = 5 \\
-3(q - 4) + 4q \amp = 5 \amp \eqnspacer \amp \text{Substitute $p = q - 4$} \\
-3q - 12 + 4q \amp = 5 \amp \amp \text{Distributive property} \\
q - 12 \amp = 5 \amp \amp \text{Combine like terms} \\
q \amp = 17 \amp \amp \text{Add 12 to both sides}
\end{aligned}
\end{equation*}