The ages Edna, and Elsa are consecutive integers. The sum of their ages is 114. What are their ages?

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 .

On a architect's drawing of a house, 1 inche representa 1.5

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles