The ratio of boys to girls in a class is 4 to 5. there are 20 boys in the class. how many girls are in the class

What is the equation of a parabola y(x) that has a vertex at point (− 1/3 , 0.3) and passes through point (− 2/15 , − 1/2 ).

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Shryia read a 481 -page-long book cover to cover in a single session, at a constant rate. after reading for 1.5 hours, she had 403 pages left to read. how fast was shryia reading? pages per hour how long did it take her to read the entire book? hours plz i realy need this