The weight of 10,000 identical samples of a substance is 1 pound. what is the weight of 1000 samples

With finding limits of multi variable !

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?

Use the zero product property to find the solutions to the equation (x+2)(x+3)=12