Tengo que resolverlo en forma de ecuación, solamente no se como poner la ecuación Un quilo de cerezas me cuesta el doble que un quilo de naranjas. Por 3 quilos de cerezas i 5 quilos de naranjas he pagado 11 euros. Que precio tiene el quilo de cada fruta?

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How do you use the elimination method for this question? explain, because i really want to understand!

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.