Abag of marbles contains 7 blue marbles and 13 red marbles. what percent of the marbles are red?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?