Aclass has six boys and 15 girls what is the ratio of boys to girls

Aquadrilateral has exactly 3 congruent sides davis claims that the figure must be a rectangle why is his claim incorrect.

Consider the input and output values for f(x) = 2x - 3 and g(x) = 2x + 7. what is a reasonable explanation for different rules with different input values producing the same sequence?

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.