Answer: 180
Step-by-step explanation:
"Use a proportion to solve the problem."
"The number of red marbles represents a part of the unknown whole."
Your answer is D. 7 hope this works
Well I would say that you would probably want to look at the chart and add the points together on that X to Y Coordinate chart. If it slopes into lower numbers it’s negative. If it goes higher in numbers it’s positive. Then if it’s to 0 then it’s zero. I can’t remember what undefined is
Put both of those equations into slope intercept form (in order to be typed into the graphing calculator).
2x + 3y = 16.9
3y = -2x + 16.9
y = (-2/3)x + 16.9/3
5x = y + 7.4
5x - 7.4 = y
So in the graphing calculator,
Y1 = (-2/3)x + 16.9/3
Y2 = 5x - 7.4
Then find the point of intersection and the x value of that would be the solution.
You get the coordinate (2.3, 4.1). So x = 2.3, y = 4.1