The total cost of four pens and seven mechanical pencils is $13.25. the cost of each pencil is 75 cents
a. using an arithmetic approach, find the cost of a pen

Multiplying fractions by whole number 5 x 1/3=?

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?

Adriana had a garden where he measured the height of a corn plant. what. on the first day,it was 145 cm tall.after 2 weeks is grew by 23 cm.what is the height of the corn plant