suppose a species of cicada and a predator come out in the same year. If the cicada comes out every 7 years and the predator comes out every 4 years, how many years will go by before the cicada and predator appear at the same time again? Explain.

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 .

The table shows the number of students who signed up for different after school activities. activity students cooking 9 chess 4 photography 8 robotics 11 select the true statements about the information in the table.

What percent of 18 is 24? and plz explain thx.