What’s the least common multiple of [a] and [b].

A movie theater runs a 16 minute short feature and a second 50 minute documentary.  If both films start at noon, at what time will they next be starting at the same time?

Simplify the expression [a] – [c].

Simplify the expression [a] – [b].

Perform the indicated operation: 1/[b] + [c]/[d] – [e]/[f]

Write [a] in Roman numerals.

Simplify the expression 2 * [a] + [b]([c] – [d])2 + |[e] – [f]|.

Simplify the expression [a] – [b]([c] + [d])2 + |[e]|.

Write [a][b][c][d]five in base 10.

Explain the process for rationalizing the denominator of an expression with a square root in the denominator.