This is very hard for me school just started

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on

Atriangle has an area of 72 square inches. if the base of the triangle has a length of 18 inches, what is the height of the triangle? use the formula for the area of a triangle: area = (base)(height) type a numerical answer in the space provided. do not include the units or spaces in your answer.

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?