A foot ball field measures 100m by 72m. A school marks a football field similar in shape to a fullsize football field but only 30m long. What is its width?

21.6 m

Step-by-step explanation:

Given

A football field measures

If a football field similar in shape to a full size  has a length

The ratio of the length of the original to the small field is the same

Assume the width of the small field is  w

Thus, the width of the field is 21.6 m

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

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!