Please help it's really not hard.

Can (3,5 and square root 34) be sides on a right triangle?

Lv beethoven software supplies customized software to a managed healthcare system. lv beethoven software's costs for the software is $1,723,000. lv beethoven software sells the software to the healthcare system for $3,816,981.10. overhead expenses are estimated at 47% of the selling price. what is lv beethoven software's net profit to the nearest dollar?

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