Subtract simplify, if possible 7 1/7-2 6/11

Ateam has p points. p = 3w + d w = wins d = draws a) a football team has 5 wins and 3 draws. how many points does the team have?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.

If the square of a positive integer is added to 2 times the integer the result is 48. find the integer.