Simplify your answer as much as possible.

Answers; a) 135 degree’s b) 30 degree’s c) 180 or 0 degree’s d) 90 degree’s

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class