David has two younger sisters, jane and sally. jane is 2 years older than sally and david is 4 times older than jane. sally is z years old.

part a

write two equivalent expressions that represent david’s age in terms of sally’s age, z, and explain how the two expressions relate to one another.

part b

which expression is more useful? why?

Mary had at least an 80% on her test write an inequality to represent this situation

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. another supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which would you choose and how much would you save with that choice? show calculator try it! if you buy 1000 ml bags, how many do you need to buy each month? type your answer in the space provided and click on the check answer button.

What is the measure of angle x? answer