TIMED QUIZ! I WILL GIVE. BRAINLIEST TO WHOMEVER ANSWERS FIRST! Krissy predicted that she would sell 65 sweaters. She actually sold 85 sweaters. What are the values of a and b in the table.

A: a= -20; b= -20
B: a= -20; b= 20
C: a= 20; b= -20
D: a= 20; b= 20​

144.50

step-by-step explanation:

21.5 x 13.4=288.10 divide by 2

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)