What is the sum?

–2.8 + 5.35

a.
–8.15

b.
–2.55

c.
2.55

d.
8.15

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Mr. roseanne will buy 12 1/2 pounds beef for for a cookout. the price for the first 3 pounds of beef is $4.99 per pound. after that, the price is $4.49 per pound. how much will mr.roshan pay for the beef