The equation for the given relation is a quadratic equation:

<h3>
How to write an equation for the given relation?</h3>
Here we have the relation:
D = {(x, y); (3, 9), (5, 25), (-2, 4), ...}
Notice that for each coordinate point, we can see that the output is equal to the square of the input:

Then the equation is just:

If you want to learn more about quadratic equations:
brainly.com/question/1214333
#SPJ1
Answer:
a=x2+5x+7
Step-by-step explanation:
x3+5x2+6x+1
-------------------
x-a
a= x2+5x+7
Interest equals principle (the amount that you had to begin with) times the rate (the rate if interest) times the time (usually in years)
Answer: 250m
Step-by-step explanation:
Length of rectangle = 140m
Length of rectangle = diameter of semicircle = 140m
Therefore, Radius(r) = 140m / 2 = 70m
Perimeter of the shaded region:
Length of tangent at P + length of tangent at Q + shaded portion of arc(AB)
Length of tangent = diameter / 2
Length of tangent = 70m
Perimeter of a circle = 2πr = 2 × 22/7 × 70 = 440m
shaded portion = 440 / 4 = 110m
Therefore, perimeter of shaded portion equals
70m + 70m + 110m = 250m