we measured breaking distances of 13 four cylinder cars and found a mean of 132.5ft and a std dev of 5.8ft. For 12 six-cylinder cars, the mean was 136.3ft and the std dev was 9.7ft. use a 0.05 significance level, to test the claim that four-cylinder cars have a shorter average breaking distance than six-cylinder cars

there are infinitely many solutions.

b. hoped i'm right lol

step-by-step explanation:

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