Em um teatro há 18 fileiras de poltronas. Em cada fileira foram colocadas 26 poltronas. Quantas poltronas há nesse teatro? ​

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?