Chose all of the values that are less than the mean of the data set shown. 4, 6, 7, 9, 10, 4, 6, 5, 4

A. 8.1
B. 4.9
C. 6
D. 6.2
E. 7

PLEASE ANSWER FAST! WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST! THX

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Ascatter plot with a trend line is shown below. which equation best represents the given data? y = x + 2 y = x + 5 y = 2x + 5

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k