A school library has the aquarium shown. The front piece of glass has an area of 7200 cm2. The top of the aquarium is open and the bottom is glass. a) How many square metres of glass were used to build the aquarium?

b) b) If it costs Rs.525 per sq. m for the glass and the making charge is Rs.500, what is the total amount spent by the school to make the aquarium?

c) If the aquarium is filled up to 50cm height, how many litres of water is filled in
the aquarium?

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24

dont know

step-by-step explanation:

hello from mrbilldoesmath!

answer:   (7x + 6y) ( 49x^2 - 42xy + 36y^2)

discussion:

in general, the factorization of a^3 + b^3 is

a^3 + b^ 3 = (a + b) ( a^2 - ab + b^2)

in our case note that 343 = 7^3 and 216 = 6^3 so the equation becomes:

343x^3 + 216y^3 = (7x)^3 + (6y)^3

if you think of a (above) as 7x and b as 6y the factorization becomes

343x^3 + 216y^3 =

((7x + 6y) (   (7x)^2 - 7x*6y + (6y)^2)   =

(7x + 6y) ( 49x^2 - 42xy + 36y^2)

you,

mrb

(a + b) (a^2 - a b + b^2)