Find the product. (4/5)(9/5)(-1/2)

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?