Write an equivalent expression in factored form.
21a - 28

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.

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

The radius of a sphere is 3 inches. which represents the volume of the sphere?