- Need help with Algebra!!!!????

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2(3+X) = 8? Why Mn values in GPC analysis doesn't increase during outdoor aging of polymer modified asphalt? What is the elements of H=[x/x is a counting number between 7 and 10]? Write each as a single mixed number (with the fraction being proper): a) 2 5/84 + 5 27/28
b) 1 3/5 − 4 2/3
c) 2 1/2 × 1/2
d) 3 9/17 ÷ 3/17? Vector A makes an angle of 20° and B makes an angle of 110° with the x axis. The magnitudes of A= 20 mag of b = 30. Find angle of resultant?