At a liberal arts college, business students have many classes to pick from. The economics courses are labeled 1,2,3,4,5,6, the finance courses are labeled 1,2,3,4,5, and the accounting courses are labeled 1,2,3,4. If a single course is picked at random, what is the probability that the course is NOT an economics course?

12cm

the answer is d

25/14 or 1.

step-by-step explanation:

the dots mean that it has infinitely more numbers behind it

c

step-by-step explanation:

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