Anumber divided by 50 has a quotient of 14 with a remainder of 2. find the number

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Hi my sisters and brothers can tell me the answer because i don’t understand the question

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn. if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.