I need help with these statistics problems, please help!

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

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

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585