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Our spring break lasted only a+b days, where a and b are positive integers and the square root of a+b equals the square root of 8. The break ends in how many days? A. 4 B. 6 C. 8 D. 16 No idea as to what to start...

If the coordinates of the vertices of a parallelogram are (-2,3), (3,1), (-1,4) and (-6,6), then one of its diagonals has a slope of A. -1 B. -2/5 C. 5/9 D. 1

The product 1.25 X 10^n is the cube of an integer when n= A. 1999 B. 2000 C. 2001 D. 2002

What is the largest power of 5 which divides the product of an the first 100 positive integers: 1 X 2 X 3 X ... X 98 X 99 X 100? A.5^2 B. 5^20 C. 5^24 D. 5^100

In a certain right triangle, the lengths of the legs have a sum of 50 and a product of 282. What is the length of the hypothenuse? A. 44 B. 42 C. 40 D. 25squareroot2

The only real root of x^3 - 1999x^2+x-1999=0 is 1999. What is the only real root of (x-1)^3-1999(x-1)^2 +(x-1)-1999=0? A. 1 B. 1998 C. 1999 D. 2000

The product of the digits of 2000 is 0. How many integers y, 2000<y<2100, also have 0 as the product of their digits? A. 19 B. 20 C. 99 D. 100

The product of 2000 negative numbers could equal. A. -200 B. -1 C. 0 D. pi

I have no work, these questions I don't know how to do...