Li is making beaded necklaces. For each necklace, she uses 21 spacers, plus 2 beads per inch of necklace lenght. Write an equation to find how many beads Li needs for each necklace, where x is lenght, in inches, of the necklace.

Which of the following expressions is equal to 2x^2+8

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?

Zack notices that segment nm and segment pq are congruent in the image below: which step could him determine if δnmo ≅δpqr by sas? (5 points) segment mo ≅ segment qr segment on ≅ segment qp ∠ n ≅ ∠ r ∠ o ≅ ∠ q