The perimeter is 36.what dose x have to be

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric