How many pounds of candy that sells for $0.86 per lb must be mixed with candy that sells for $1.25 per lb to obtain 7 lb of a mixture that should sell for $0.93 per lb?
$0.86-per-ib candy: 5.70 lb
(type an integer or decimal rounded to two decimal places as needed.)

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

The customer price index(cpi), which measures the cost of a typical package of customer goods, was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely. use data points to find such a line and then estimate the requested quantities

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