For what values of k does x^2+kx+7=0 have no roots

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Can someone me with my hwplz(only the circled ones)

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