a) the answer of the substitute is 300
b) the answer of the substitute is 7027/300 or 23.423
We can see that

The given points are on same line.
Further explanation:
There are two methods to find if the given points are on same line
- The slope method: If the points are on same line the slopes of two pairs of points will be same
- Area of triangle method
Given points are:
A(1,3) B(4,2) C(-2,4)
We will find the slope of AB, BC, and AC
So,




We can see that

The given points are on same line.
Keywords: Slope, Co linear points
Learn more about slope at:
#LearnwithBrainly
Answer:
x= 47
18+2 201 i ≈0.382978723+0.603295612i
x= 47
−2 201 i+18 ≈0.382978723−0.603295612i Hopefully this makes just the same amount of sense as this question
Marked price = 200 + 40% of 200 = 200 * 0.4*200 = 200 + 80 = $280
price after 25% discount = 280 - 0.25*280
can you work that out?
Answer is b my friend hope it helps if ya need me to explain I can for u:3