Which choice is equivalent to the fraction below? (Hint: Rationalize the denominator and simplify .) 2/(sqrt(x) + sqrt(x + 2))

Divide: 1573 ÷ 7 = a) 222 r5 b) 223 r6 c) 224 r5 d) 224 r3

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?