Answer:
15
Step-by-step explanation:
We assume your "natural numbers" are <em>positive integers</em>. (Some authors also include zero.)
n(B) = 5
n(U) = 20
n(B') = 20 -5 = 15
Slope-intercept form: y = mx + b
(m is the slope, b is the y-intercept or the y value when x = 0 --> (0, y) or the point where the line crosses through the y-axis)
The initial value is the y-intercept, or it's like the starting point.
If the equation has an initial value of 10, b = 10
Your answer is the 2nd option because the y-intercept is 10
Do Parantheses exponents multiplication division addition and subtraction and it will be easy