Jessica has several red, white, and black marbles in her pocket. if she draws a marble out of her pocket without looking, the probability of drawing a red marble is
2
5
,
the probability of drawing a white marble is
1
10
,
and the probability of drawing a black marble is
1
2
.
how many marbles of each color could she have? show your work.

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.

At saturday nights football game there were 18 less fans than half the fans at friday nights game. there were "x" fans at friday's game. write an expression to represent the number of fans at saturday's game. *** urgent***

Nicholas says that two pairs of congruent angles can be used to show that the two triangles are similar