Find the lowest common denominator of (5)/(x^2+x-6)-(3)/(2x+2)+(7)/(5x-10 ) A. (X^2+x-6)(2x+2)(5x-10)
B. (X-2)(x+3)
C. (X+3)(x-2)(x+1)
D. 10(x-2)(x+3)(x+1)

What is the number 321,000,000 in scientific notation? also what is the number? ?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar