Anastasia is grocery shopping with her father and wonders how much shopping is left to do. “we already have 60% of the items on our list,” her father says. Anastasia is 12 items in the cart. How many grocery items are on the list?

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

it has to have an angle of 90 degrees

a sample of water is taken and kept in a beaker in a freezer at a constant temperature of 0°c. if the system is at dynamic equilibrium, which of these statements is true?  

135

step-by-step explanation:

blah f

df

vdf

vd

fvdf