(a)[1]
Simplify the expression $5a + 6a - a$.
(b)[3]
Write an expression for the rectangle’s perimeter, and give the answer in simplest form.
(c(i))[2]
Find the value of $5x + 10y$ for $x = 7$ and $y = 9$.
(c(ii))[2]
Find the value of $4r^2 - pr$ when $p = 3$ and $r = 5$.
(d)[3]
Solve for $x$ in $5(3x - 6) = 75$.
(e(i))[2]
Complete the table using expressions written in terms of $x$.
(e(ii))[1]
The five ages add to 125 years. Write an equation in terms of $x$ and show that it simplifies to $11x - 7 = 125$.
(e(iii))[2]
Find Molly’s age by solving $11x - 7 = 125$.