The cost in dollars to produce x cups of lemonade is represented by the function c(x) = 10 + 0.20x. the revenue in dollars earned by selling x cups of lemonade is represented by the function r(x) = 0.50x. what is the minimum number of whole cups of lemonade that must be sold for the revenue to exceed the cost?

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these