Benedict paid $7.50 for 3 similar erasers and 3 similar pens. Each pen cost $0.80 more than each eraser. How much did each pen cost?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Which expression is rational? 6. , square root two, square root 14, square root 49