The interior angles formed by the sides of a quadrilateral have measures that sum to 360°. What is the value of x?

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What number should be added to both sides of the equation to complete this square? x^2-10x=7

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.