If the airplane is traveling at a velocity of 320 km/h to the north, how long will it take to reach its destination if that destination is 2300 km to the north

7. 1 hour take to reach its destination if that destination is 2300 km to the north .

Step-by-step explanation:

Given  : The airplane is traveling at a velocity of 320 km/h to the north,

To find : how long will it take to reach its destination if that destination is 2300 km to the north.

Solution : We have given

Airplane cover 320 km =  1 hour .

Airplane cover 1 km = hour.

Airplane cover 2300 km = .

                                        =  7. 1 hour.

Therefore,  7. 1 hour take to reach its destination if that destination is 2300 km to the north .

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!

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.