The ratio of brown tiles to white tiles in Mrs. Harris’ kitchen is 4 to 5. There are 180 white tiles in the kitchen. What is the total number of tiles in Mrs. Harris’ kitchen?

Need on this one asap im almost done with this subject

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

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20