Calculati media aritmetica ponderata a numerelor m1,m2,m3 cu ponderile p1,p2,respectiv p3, indicate in fiecare caz:
a) m1=2; m2=-3; m3=1,5; p1=4; p2=5; p3=-7.

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

What is the solution to the division problem below x3+x2-11x+4/x+4