Usando as letras do conjunto { a, b, c, d, e, f, g, h, ij } qu quantas senhas de 4 letras podem ser
formadas de modo que duas letras adjacentes, isto é, vizinhas, sejam necessariamente diferentes?

Cass decided to sell game programs for the hockey game. the printing cost was over 20 cents per program with a selling price of 50 cents each. cass sold all but 50 of the programs, and made a profit of $65. how many programs were printed? letting p represent the number of programs printed, set up an equation that describes this situation. then solve your equation for p.

Marya wants to factor the polynomial 36x^3 -22x^2 - 144x. which term can she add to the polynomial that would not change its grestest common factor? check all that apply

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.