Find the discriminant to determine the number of roots, then solve the quadratic equation using the quadratic formula. x^2+x-2=0

Please list discriminant, number of roots, and solution

The school that imani goes to is selling tickets to the annual dance competition. on the first day of the ticket sales the school sold 7 adult tickets and 5 child tickets for a total of $96. the school took in $40 on the second day by seling 3 adult tickets . find the price of an adult ticket and the price of a child ticket. solve by using substitution elimination college prep algebra math heres the 2 equations i came up with 7x+5y=96 and 3x+2y= -40 show all workiv be stuck on this.

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how