1. The cost of an article is directly proportional to the time spent making it. An article taking 6 hours to make costs £30. Find the following:
a. the cost of an article that takes 5 hours to make
b. the length of time it takes to make an article costing £40

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters