What is ther interquartile range of this data set.
7,13,9,15,11,7,11

#12 find the value of x. #13 find the value of the variable.

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

How do i solve uniform motion problems?