- What is the perimeter of a block that is 25m long and 20m wide?

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Find all solutions to the following system of nonlinear equations.
(x − 2)^2 + y ^2 = 20
(x + 2)^2 + y^ 2 = 20? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? Discrete Help ASAP. Please write out symbolic notation.? Find a positive angle, less than 360 degrees, that is coterminal with a 1715 degree angle. Please show steps!!? Find Marginal Cost from total cost function (P^2)A(P)?