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Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

What are the soultion(s) to the quadratic equation 40- x^2=0

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.