Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

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?

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.