He had 44 books before the purchases because 12% of 50 is 6 and 6-50 is 44
<h2>
Hello!</h2>
The answer is:
The function intercepts de x-axis at "x" equal to 1.631.
<h2>
Why?</h2>
To find the x-intercept of the function, we need to make f(x) or "y" equal to 0, and then, isolate "x".
So, isolating we have:

Hence, we have that the function intercepts de x-axis at "x" equal to 1.631.
Have a nice day!
Note: I have attached a picture for better understanding.
12v + 3b = 243
4v + 4b = 204....multiply by -3
-------------------
12v + 3b = 243
-12v - 12b = - 612 (result of multiplying by -3)
-------------------add
-9b = - 369
b = -369/-9
b = 41 <=== each bus holds 41 students
4v + 4b = 204
4v + 4(41) = 204
4v + 164 = 204
4v = 204 - 164
4v = 40
v = 40/4
v = 10 <== each van holds 10 students
Answer:

Step-by-step explanation:
Hello there!
Just find the area of both circles, cancel out pi, and use the resulting fraction.
:)