Since they want only the coordinates of the vertices. You only care about where the lines intersect, the greater than, less than signs are irrelevant.
Get each equation in 'y=mx+b' form
1) y = -x + 9
2) y = 2x-21
3) y = -4x +15
Now you can set any 2 equations equal to each other and solve for 'x'.
This will be the 'x' coordinate of the point where the 2 lines intersect.
You need 3 points, so you will need 3 different sets of 2 equations:
1) = 2)
2x -21 = -x+9
3x = 30
x = 10 -----> y = -(10)+9 = -1
1) = 3)
-x+9 = -4x+15
3x = 6
x = 2 -------> y = -(2) + 9 = 7
2) = 3)
2x - 21 = -4x+15
6x = 36
x = 6 ---------> y = 2(6) -21 = -9
Therefore the 3 intersecting points are:
(10,-1)
(2, 7)
(6, -9)
Avery has 12 marbles total. 2 x 6 = 12
We are given a line passes through the point (-2,5). The slope should have been given as well. Assuming that the slope is 2, we can determine the values of x and y for the points A and B.
The formula for the slope is
m = (y2 - y1)/(x2 - x1)
The slope between (-2,5) and A(x,3) is
2 = (3 - 5) / (x - (-2))
Solve for x
Use the same approach for the points (-2,5) and B(-2,y) to solve for y.
The equation modeled is 
The given equation Much easier to understand with the symbol
x x .x -1
x x² x² x² -x
-1 -x -x- x +1
That is how I interpreted the "tile" set up.
Now count up the factors:
There are 3 x² . There are 4 -x and a +1
That's the third answer choice.
learn more about Solution Quadratic Equation
brainly.com/question/1214333
21147
Answer:
trice the number"s"
Step-by-step explanation:
is this wht u want ? like am i rght? if not pls delete my answer.
