Awomen keeps fit by bicycling and running every day. on monday she spends 1/2 h at each activity, covering a total of 14.5 mi. on tuesday she runs for 12 min and cycles for 45 min, covering a total of 18.45 mi. assuming that her tuning and cycling speeds don’t change from day to day, find these speeds.

d

step-by-step explanation:

d

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step-by-step explanation:

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!