Which line(s) are lines of symmetry for the graph of x^2=1/(y^2)

What is f(3) for the quadratic functionf(x)=2x2 + x – 12? f -3g 3h 6i. 9

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

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