Mr. Trinh is shopping for caps for his 3 sons. If he buys exactly 3 hats, which store will give the greatest cost savings?

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Abcd is a parallelogram find the valuse of x