Solve the following system of equations using the elimination method, with step by step. x^2+y^2=13

x^2-y=7
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After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

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Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides. should be his answer