The table shows the battery life of four different mobile phones: Mobile Phone Battery Life Phone Battery Life (hours) A 20 B 25 C 10 D 18 If 8.45% of the battery life of each mobile phone is used in a day by a typical user, which mobile phone would use a total of 1.69 hours of battery life in a day? (1 point) a Phone A b Phone B c Phone C d Phone D

-2 is the right

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)

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63

2 1/2 feet

step-by-step explanation: