Rob is setting up a model train track that is 3 and 3 over 8feet long. no telephone pole is needed at the start of the track. however, along the track, he places a telephone pole every 3 over 8foot apart. how many telephone poles does he need? (input number values only)

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?