Calculează și afla care este valoarea lui a din:8x(24-24:4x3)+a3=91

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

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls