4.3d Algebra 2

Get ready for a “Small Quiz” to be written on your grade sheet.

Quiz. Copy the problems and write the answer. Solve using Cramer’s Rule:

Money problems (Cost per item)×(number of items) + (Cost per item)×(number of items) = total cost (Number of first item) + (number of second item) = total number of items Example: One week a business sold 40 scarves. White ones cost $4.95, and printed ones cost $7.95. In all, $282 worth of scarves were sold. How many of each kind were sold?

28 printed scarves; 12 white scarves

Age problems Example: Paula is 12 years older than her brother Bob. Four years from now, Bob will be two-thirds as old as Paula. How old are they now? Heading: NowThen PaulaPP + 4 BobBB + 4

Paula is 32 and Bob is 20.

Classwork: 20/172 2/178