Triangle A'B'C' is a dilation of triangle ABC about point P. Is this dilation a reduction or enlargement?

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?