The perimeter of the rectangle is 80cm. The area is A cm^2. Show that x^2 - 40x + A = 0

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Which statement is not always true for a parallelogram? (a) opposite sides are congruent. (b) diagonals bisect each other. (c) it has 4 congruent angles. (d) consecutive angles are supplementary.

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Identify the conclusion of the conditional statement. if you live in phoenix, then you live in arizona.