Aaron has x nickels and y pennies. He has no less than 20 coins worth no more than $0.40 combined. Solve this system of inequalities graphically and determine one possible solution.

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

In what organelle does photosynthesis take place?