Jerry and kelvin has an equal number of marbles at first. jerry gave away 120 of his marbles and kelvin bought another 148 marbles. find the number of marbles jerry had at first. asap.

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Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.