Categorize these samples as representative or not representative. the picture is on here.

Tina: not representative. This is because she is only interviewing students that play a sport and are therefore very likely to exercise often rather than students who don't play sports.

Joe: not representative. He should be talking to both mothers and fathers of children of all ages, not just fathers of high school age children.

Jeremy: representative. The sample is random and unbiased.

Alana: representative. The sample came from multiple teachers who teach each subject.

Alisha: not representative. The sample is not random and is biased because Alisha already knows the people she is sampling.

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

b if for most of the graph

d if y intercept

step-by-step explanation: