Arik bought 20 calculators at the electronics store. 40% of the calculators were scientific calculators and one half of the calculators were graphing calculators . how many neither scientific calculators nor graphing calculators

Ok lets grab our calculators!

Lets say Arik has 20 calculators at the store.

Lets multiply 20 x 40%

We should get 8

There is 8 scientific calculators

100 percent minus 40 percent is 60 percent

Lets multiply 20 x 60%

There is 12 graphing calculators

8 scientific calculators

12 graphing calculators

If you want to do this on paper or in your head

100 ÷ 20 = 5

each calculator is 5 percent

answer: okw

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)