Please help me I really need help with this Pleaseee

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

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.

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation