A can of mushrooms cost 80 cents and a can of fruit cocktail cost 90 cents. How much money did Mr. Franz spend? Express your answer in terms of x
in dollars.

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .