The walls of a bathroom 2,5 m long, 2,05 m wide and 3 m high are to be covered with
tiles, each 15 cm by 15 cm. If a saving of
108 tiles is made on doors and windows,
how many tiles will be needed altogether?
(Note that some tiles will have to be cut.)

The variable z is directly proportional to x, and inversely proportional to y. when x is 4 and y is 13, z has the value 1.2307692307692. what is the value of z when x= 9, and y= 20

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.