What guides a researcher when deciding between using either linear, logistic, or cox proportional hazards regression as an analysis tool?
a. the types of predictors (binary, multi-categorical, or continuous) that may be used in the regression model(s).
b. the number of observations in the dataset being analyzed.
c. the outcome variable type (continuous, binary, or time –to-event) for the particular analyses
utilizing the regression model(s).
d. whether or not the researcher wants to investigate confounding.
the generic formulation of a multiple regression model including age (x1=age in years), sex (x2= 1 if female, 0 if male), and smoking status (x3 = 1 if smoker, and 0 if non-smoker) as predictors is as follows:
= + + + where lhs = "left hand side", and intercept = ln

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.

sorry man i accidentally pressed yes my bad

step-by-step explanation:

hi how are you doing today? if you ever need just tell me

step-by-step explanation:

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.