Can somebody plz help answer these word prob questions plz thanks! (Grade7math( btw :) WILL MARK BRAINLIEST WHOEVER ANSWER FIRST :DDD

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

In an isosceles triangle, the vertex angle is 112 degrees. what is the measure of each base. a.34 b.24 c.44 d.54

£100.80 divided by 14 equals 7.2 how would we put this as money