Solve the system of equations given by x^2-y=3 and x+y=3. The answers will be in ordered pair.

I got (2,1) but it was wrong.

Find a general term an for the arithmetic sequence given by a1=-3 and d=5. Enter your answer by giving just the expression for the term an, so for instance if you find an=8n-7, you would enter your answer as just 8n-7, using no spaces or upper case letters.

9, 6, 4, 8/3, 16/9, find a symbolic representation for the series in the form f(n)=cr^(n-1). Enter the constant you find for c in blank #1, and the ratio you find for r in blank #2. Enter your answers as numbers only, using no spaces, and any fractions in the form #/#. So, for example, if you found f(n)=6(1/2)^(n-1), you would enter 6 in blank #1, and 1/2 in blank #2
I know the ratio is 1.5

5 + 5/2 + 5/4 + 5/8 + 5/16 + Enter your answer as just a number, using no spaces. If your answer is a fraction, enter it in the form #/#.

The formula is a1((1-r^n)/(1-r)) So i got 5(1-5/2^5)/(1-5/2) I got 322, is that right?