You were billed $28.50 for additional data usage on your cell phone at a rate of $9 per gigabyte. three choices are correct ways to calculate the additional gigabytes, g, that you used. which choice is not? (9g=28.5) (9g=28.5) ( 28.5=9⋅g) (28.59=g)

28.59=g is incorrect.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

Bill for additional data usage: $28.50

Cost per gigabyte: $9

To calculate the additional gigabytes we have to write an expression where the total bill ($28.5) is equal to the gigabytes used (g) multiplied by the cost per gigabyte.

Mathematically speaking:

28.5 = 9g

The three first options are correct (one is put in a different order but is the same expression). So, the incorrect option is (28.59=g).

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

answer: none of these answers are correct only the second half is

step-by-step explanation: