When nelly went to lunch, she paid $16.20 for her sandwich, plus tax. if tax was 6%,how much, in total, did she pay for lunch.(round your answer to the nearest cent)

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

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.

If u good at math hit me up on insta or sum @basic_jaiden or @ and