If S lies between R and T, RT=21, RS=2X+5, and ST=3x-4. Find RS and ST

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document