At a restaurant 6% tax on a meal comes to $1.56 how much is a 15% tip on that meal if it figured before taxes

Ok so I'm assuming that $1.56 is 6% of the meal so 100% divided by 6 = 16.66

so 16.66 x 15% = $250.00

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!