Describe the set of points whose distance from the y-axis equals the distance from the xz-plane. A. A cone opening along the y-axis B. A cone opening along the x-axis C. A cone opening along the z-axis D. A cylinder opening along the z-axis E. A cylinder opening along the y-axis F. A cylinder opening along the x-axis (b) Find the equation for the set of points whose distance from the y-axis equals the distance from the xz-plane. A. x2 y2

whats the

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.