One mole of hydrogen gas (molar mass = 2.0 g/mol) has an rms velocity o 2.0 x 103 m/s. To what temperature on the Celsius scale does this correspond?

1. ANALYTICAL METHOD OF ADDING VECTORS Solve the same problem as PART 1 but this time analytically. START with the values below. DO NOT USE VALUES FROM PART 1. Suppose you first walk A = 12 m in a direction 20° west of north and then B= 20 m in a direction 40° south of west. Let the +x-axis coincide with the easterly direction and the +y-axis with the northerly direction. Note: In this problem, do not round values if you need to use them for calculations in subsequent parts. Rounding errors can propagate and can make your final answer lie outside the tolerance limit of 5% set for this problem. Keep all answers to 4 significant figures.

If y equals to 9 minus 7x plus 2x squared, find y when x equals to 3?

Please give me answer for incorrect (b) one