Of the 1,640 students enrolled at school, 50% cine to school by bus, 35% come by car, and the rest of the students walk to school

Hello,

The number of students who come to the school by bus is of :

1 640 * 50 / 100 = 820 students

The number of students who come to the school by car is of :

1 640 * 35 / 100 = 574 students

The total number of students who come to the school by bus or by car is of :

820 + 574 = 1 394 students

The number of pupils who go to the school on foot is of :

1 640 - 1 394 = 246 students

Bye :)

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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!