I need help on this question I would appreciate the help ​

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

3.4a=57.8 what is the the value of a

Find the distance between the point (-3,-4), and (see the picture below)