Ok, so we need to set up a system of equations.
x + y = 19, where x is notebooks and y is pencils
2.2x + 1.09y = 30.70. You use the coefficient for individual prices and the total for the total given.
2.2x + 2.2y = 41.8 (multiply for elimination later)
2.2x + 1.09y = 30.7
1.11y = 11.1
y = 11.1/1.11
y = 10
Now we use the substitution method in x + y = 19
x + 10 = 19
x = 9
9 notebooks and 10 pencils
The mid-point is (8,0)
Further explanation:
A mid-point is the point on the line which divides the line in two equal segments
The formula for mid-point is:

Where (x1,y1) are the coordinates of first point and (x2,y2) are the coordinates of second point.
Here,
(x1, y1) = (4,-3)
(x2,y2) = (12,3)
So,

The mid-point is (8,0)
Keywords: Mid-point, coordinate geometry
Learn more about mid-points at:
#LearnwithBrainly
X² - 5 + -24
x² - 5 - 24
x² + (-5 - 24)
x² + 29
hope this helps, God bless!
Answer:
c = 13
Step-by-step explanation:
pythogoras theorem
a² + b² = c²
5² = 25
12² = 144
25 + 144<em> </em>= 169
√169 = 13
c = 13
Coordinate of red point = (8, -5)
In short, Your Answer would be Option D
Hope this helps!