Solve the system of equations.
3x+3y+6z=3
3x+2y+6z=7
4x+4y+7z=4

4. find the geometric mean of 4 and 12. 24 8

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k