Friday, February 25, 2011

I need help on these math questions plz?

a rancher is putting up a rectangular electric fence to contain some horses. the rancher has 1200 feet of electric wire. the fence needs to be at least 120 feet in one direction in order to contain the barn. which order pair gives a length and a width that stisfies the conditions above? a) (150,500) b) (175,450) c) (200,400) d)(125,550) Jared earns money by making gift baskets for Father's Day. He does one filled with fishing supplies and one with a sports fan theme. He makes a profit of $12.50 on the sports fan basket. He only has time to make 100 baskets and needs to earn at least $1,000 to cover his summer activities. Which solution stifies the system of inequalities? a) 73 fishing baskets and 27 sports fan baskets b) 75 fishing baskets and 25 sports fan baskets c) 70 fishing baskets and 30 sports fan baskets d) 72 fishing baskets and 28 sports fan baskets
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1) At least 1 dimension has to be 120 and the perimeter cannot exceed 1200. All satisfy the first requirement, but Pa=1300 Pb=1250 Pc=1200 Pd=1350 so only c fits 2) Are you not given the profit per fishing basket? if not you have 12.50x +P*f=1000 x+f=100 which is 2 equations and three unknowns which can't be solved. If you have the profit, then you have two equations and two unknowns and you can solve for x and f
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