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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To answer this problem, we determine first the volume of the cubes by the equation,
                                v = e³
where v is volume and e is the length of each edge. substituting the known value to the equation,
                              v = (1/3 in)³ = 1/27 in³
then, to determine the volume of the prism, we multiply the calculated volume to the number of cubes. that is,
                            v (prism) = (1/27 in³)(3996 cubes) = 137.89 in³
thus, the volume of the prism is approximately 137.89 in³.