A fruit stand has to decide what to charge for their produce. They need 5.30dollar for 1 apple and 1 orange. They also need $7.30dollar for 1 apple and 2 oranges. We put this information into a system of linear equations.

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days