Josh drives 150 miles in 3 hours. What is the constant proportionality, k?*. A k= 2 miles per hour
B k= 0.02 miles per hour
C k=75 miles per hour
D k=50 miles per hour

In this case, your best bet is to use align* for the outer alignment (the = signs), and aligned for the inner one (the + signs): this is because \begin{aligned}...\end{aligned} is designed to be nested within other kinds of display math. However, you also want to vertically align the inner one (at the pluses) with the outer one, so you'll write it as \begin{aligned}[t]...\end{aligned}. Here's what it looks like in code: \documentclass{article} \usepackage{amsmath} \begin{document} \begin{align*} A_1 &= \begin{aligned}[t] a_1 &+ a_2 + a_3 + a_4 + a_5 + a_6 + a_7\\ &+ a_8 + a_9 + a_{10} + a_{11} + a_{12} + a_{13}\\ &+ a_{14} + a_{15} + a_{16} + a_{17} + a_{18} + a_{19} \end{aligned}\\ A_2 &= \begin{aligned}[t] a_2 &+ b_2 + b_3 + b_4 + b_5 + b_6 + b_7\\ &+ b_8 + b_9 + b_{10} + b_{11} + b_{12} + b_{13}\\ &+ b_{14} + b_{15} + b_{16} + b_{17} + b_{18} + b_{19} \end{aligned} \end{align*} \end{document}