What are the two main reasons for including covariates in ANOVA?

A. (1) To reduce within-group error variance (2) Elimination of confounds
B. (1) To increase within-group error variance (2) To reduce between-group error variance
C. (1) To increase within-group error variance (2) To reduce between-group error variance
D. (1) To increase between-group variance (2) To reduce within-group error variance

a

step-by-step explanation:

2.

according to newton’s cannonball model, what happens if the cannonball's velocity is enough to overpower the pull of earth’s gravitystep-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

a

step-by-step explanation:

u take $30 minus $24. the answer/original($30)