What number would be the most accurate approximation for the square root of 78

Suppose a least-squares regression line is given by modifyingabove y with caret equals 4.302 x minus 3.293. what is the mean value of the response variable if xequals20?

The following division is being performed using multiplication by the reciprocal find the missing numbers is 5/12 divided by x/3 equals 5/12 times x/10 equals 1/x

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?