The difference of the sample means of two populations is 34.6, and the standard deviation of the difference of the sample means is 11.9.
the 95% confidence interval lies between (a.-11.9, b.-23.8, c.-35.7, d.-45.4) and (a.+11.9, b.+23.8, c.+35.7, d.+45.4)

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

days of the week

step-by-step explanation:

javier earned more money then kyle, so that won't always be a constant term, but the days of the week do not change so that term is always constant.

edit: i meant

any options?

step-by-step explanation: