Acar dealership sells sedans and suvs. in 2000,the ratio in which they were sold was 5: 4.by 2010 the dealership had adjusted its inventory to a 2: 7ratio. if it sold 84 suvs in2010,how many sedans did it sell in 2000

hello from mrbilldoesmath!

answer:

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

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

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

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

list

6,24,51,72,12,54,80,44,57,64,92,26,66,96

your welcome!

a. true

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