A TV has been reduced in price by
30%. It now costs £350.
How much did it cost before the sale? revece percentage

£500.

Step-by-step explanation:

100 - 30 = 70 % is equivalent to £350

100%  ..   ..  ...  ... ... ...  ..    .. ..  .         (350 * 100) / 70

= £500.

the answer is 99.

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!