How do i factor (x^2 + 1)^1/2 +2(x^2 + 1)^1/2

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7