2/9 of the students in a school are in 6th grade. Which thing is the independent variable? Which thing is the dependent variable?

please help

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*