What value of b makes the polynomial below a perfect square? . x2 + bx + 16. b =. a. 16 . b. 8 . c. 2 . d. 4 .

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15