Ryan is biking at 31.8 miles per hour. what is his speed in feet per second? round to nearest tenth

46.6 ft/sec (to the nearest tenth)

Step-by-step explanation:

There's a common identity useful here:  60 mph = 88 ft/sec.

Mult. 31.8 mph by the conversion factor (88 ft/sec) / (60 mph), obtaining:

46.64 ft/sec.

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!

can you make your screen more see able?

then i might be able to .