Can you help me on question eight?!

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Apicture frame has a perimeter of 100cm it’s width is 4 cm less than twice its length what is the width of the picture frame a) 18 cm b) 32 cm c) 48 cm d) 50 cm

Which of the following is equal to 369 milligrams? 0.369 gram 36.9 grams 369,000 grams 36,900 grams