If an estimator is unbiased, then A. the mean of the estimator is usually close to the true value. B. the estimator is usually close to the true value. C. the mean of the estimator is equal to the true value. D. the estimator is equal to the true value. The variance of an estimator measures A. how close the estimator is to the true value. B. how close repeated values of the mean of the estimator are to each other. C. how close repeated values of the estimator are to each other. D. how close the mean of the estimator is to the true value.

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.

d .tv

step-by-step explanation:

the side tv is included in both triangles.   this means it corresponds to itself in the transformation.

this is justified by using the reflexive property, which states that anything is congruent to itself.