2 + x =10 what is x Wouldn't x be 8

x-2 = 10-2
x = 8

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?