What do we mean when we say that a simple linear regression model is "statistically" useful? a. the model is "practically" useful for predicting y. b. the model is a better predictor of y than the sample mean, . c. the model is an excellent predictor of y. d. all the statistics computed from the sample make sense.

3x3 = 9 and 2x2 = 4

step-by-step explanation:

it’s the first one your welcome

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

the second option

step-by-step explanation: