Eliminate y to solve for x. plug in x into the second equation to solve for why
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What ia the sum if the first 7 terms of the geometric series

Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?  

Find the solution set for this equation: t^2+7t=0 separate the two values with a comma.