Answer:
x=-2
Step-by-step explanation:
The first step is to find the slope
m = (y2-y1)/ (x2-x1)
= (5-0)/(-2--2)
= (5-0) /(-2+2)
= 5/0
The slope is undefined
That means it is a vertical line (up and down) The x value does not change
x=-2
Answer:
There were 40 2-point questions and 9 3-point questions.
Step-by-step explanation:
To solve this situation, write two equations. One for the number of questions and one for the number of points.
Let x be the number of 2 point questions.
Let y be the number of 5 point questions.
x + y = 49
Now since x are each worth 2 points, the total points is 2x.
And since y are each worth 5 points, the total points is 5y.
So 2x + 5y = 125. Substitute one of the equations into the other to solve for the variables.
x + y = 49 becomes x = 49 - y. Substitute it.
2(49-y) + 5y = 125
98 - 2y + 5y = 125
98 + 3y = 125
3y = 27
y = 9
Substitute y = 9 back into the equation x = 49 - y to find x.
x = 49 - 9
x = 40
F(x)=-x+12/4 Not sure if this is right..
