Solve. use any strategy.
a box of chalk and 2 staplers cost $10. three boxes of chalk
and 2 staplers cost $18. find the total cost of 1 box of chalk
constant
and 1 stapler.
staplers
chalk
1
cost
10
transaction#1 /
18
transaction 2
what's the difference in the 2 transactions?
cost of chalk=
cost of " stapler=

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0