Which one of the following statements expresses a true proportion?
a. 2 : 3 = 3 : 2
b. 42 : 7 = 6 : 2
c. 14 : 6 = 28 : 18
d. 3 : 5 = 12 : 20

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.

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?

Which expression is the factorization of x^2+10+21