How many years does it take an account with a principal of $400 and an annual simple interest of 2% to double?

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Solve 3x-18=2y and 5x-6y=6 by elimination show work

: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?