If a barrel is 1/5 full and holds 16 litres how many litres will it hold when 1/2 full how does it fill

40liters

Step-by-step explanation:

Given data

1/5 full holds 16 liters

1/2 full barrel will hold???

Let 1/2 full barrel hold x liters

1/5 holds 16 liters

1/2 will hold x

cross multtiply

1/2*16= x/5

8= x/5

x= 8*5

x= 40 liters

Hence 1/2 full will hold 40liters

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!

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: