Which of these are rational expressions 4/7, x/-4, y(y+4), (5x-2)(2x-1) ?

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Fa bus driver leaves her first stop by 7: 00 a. m., her route will take less than 37 minutes. if she leaves after 7: 00 a. m., she estimates that the same route will take no less than 42 minutes. which inequality represents the time it takes to drive the route, r?