Jeff's dog weighs 76 pounds what is the dog's weight rounded to the nearest ten pounds

Find the domain of the function  [tex]f(x) = \sqrt{3x - 7} [/tex]in interval form, the domain of f is what? in advance.

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r