Twelve gallons of a salt solution consists of 25% salt. It is the result of mixing a 30% solution with a 20% solution. How many gallons of each of the solutions was used? Let x= the number of gallons of the 30% solution and y= the number of gallons of the 20% solution. The corresponding modeling system is {x+y=120.3x+0.2y=0.25(12). Solve the system by using the method of substitution.

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

the answer is 8/21

hope this

answer: 30

step-by-step explanation: its 30 because im a basketball player and stephen curry hits most of his shots so if you put 30 you might make the shot goodluck