A fence is made from 32 identical pieces of wood, each of length 2 metres correct to nearest centimetre. Calculate the lower bound for the total length of wood used to make this fence.
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How do you solving the solution of each system using elimination?

Kevin's bank offered him a 4.5% interest rate for his mortgage. if he purchases 3 points, what will be his new rate?

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?