What is the answer to this question 3a - 15 = 6

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What is the quotient of - 28 and - 7?

What is 143/8 written in mixed numbers

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a pile of 12 books is 1.2 meter thick 9 of them are 9.5 centimeters thick each and the rest are of equal thickness. for the rest of the books, how thick is each of them in centimeter?

How do you factor 15y^2+16y-15

4a - 18=6a+4 what is a

What is the greatest common factor of 6x^4 + 24x^3 - 72x^2?