Which expression gives the surface area of a sphere with radius ? OA. T2
O B. 4n
O c. 4n
O D. 42
1IRNIIT

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.