On serena's 10th birthday her mother is 3 times as old. how old will serena and her mother be when 0.5 times her mothers age will equal serena's age?

Which is an equation for the nth terms of the sequence 12,15,18,21

Are the corresponding angles congruent? explain why or why not.

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle