If 20 kisses and 5 hugs cost $11.50 and 3 kisses and 10 hugs cost $4.50. how much does one kiss cost?

Can someone me do math because i am having a breakdown rn because i don’t get it

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches. approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *