Help, answer if you know thank you

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

Consider the function f(x)=-5x+3 what is f(-2)

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me