9. mrs. sorenstam bought one ruler, one compass, and one
mechanical pencil at the prices shown in the table for each
of her 12 students.
a. suppose mrs. sorenstam had 36 cents left after buying the
school supplies. write an equation to find the amount of
money mrs. sorenstam initially had to spend on each student.

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?