Prove that: (1/SecA-+TanA) = (SecA-TanA)

How do businesses a country's economy? a. by investing in goods and services b. by increasing the unemployment rate c. by making profits

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?