The Kerwoods went out to eat at their favorite resturant. If there bill was $58.60 and they gave their server $8.79 for a tip, what percent gratuity did they leave the server?

15%

Step-by-step explanation:

They gave their server $8.79 and their total bill was $58.60.

The question wants to know how much percentage of the total bill the tip they gave is:

= Tip / Total bill * 100%

= 8.79 / 58.60 * 100%

= 15%

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