Frances has piano lessons every fourth day.
she has ballet lessons every fifth day.
she has soccer every second day.
on which day will she have all three activities? explain the answer.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

What is the slope of the line that contains the points (-2,1) and (0,-3)

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?