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Two numbers on a piece of paper. 1/5 of the first number is 12 more than 1/2 of the second number, the sum of the two numbers is 221. a) what is the first number b) what is the second number.

In 2013, the membership for The Church of Jesus Christ of Latter-day Saints reached 14,780,000 members. In 1990, the membership for The Church of Jesus Christ of Latter-day Saints was 7,300,000 members. Letting t = 0 represent the year 2013 and assuming the church...

A student has an average score of 88 in her math class. This is the average of her first five math tests. What must she score on the sixth test in order to have a mean score of 90? Am I close in how to solve this? I know I am missing something but not sure what?...