Which phrase describes an unknown or changeable quantity/
a. 15 years of schooling
b. 3 dollars and 76 cents
c. 2 times the number of pages in the books
d. 60 seconds multiplied by 5

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What is the measure of one interior angle of a pentagon

Alarger number is double the sum of a smaller number. the larger number is 2 less than 3 times the smaller number. if y represents the larger number and x represents the smaller number, which equations model the situation