X+6y=64 and 2x+5y=-26

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The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers