Answer:
A. The distance from any point in the circle to the origin
Step-by-step explanation:
The distance formula tells you that the distance (d) is related to the coordinates of two points (x1, y1) and (x2, y2) by ...
d² = (x2 -x1)² +(y2 -y1)²
For points (x, y) on the circle and (0, 0) at the origin, this becomes ...
d² = (x -0)² +(y -0)²
If we want the distance to the point (x, y) to be equal to the radius of the circle, this becomes ...
x² +y² = r² . . . . . . the standard equation of a circle centered at the origin
Answer:
Step-by-step explanation:
area=(20 ×20)÷2=200 sq . units
Answer:
2 miles = 3520 yards
Step-by-step explanation:
1 mile = 1760 yards
2 miles = 3520 yards
Answer:
375 girls
Step-by-step explanation:
Let the number of girls in the school be y.
Then, we can write the equation:

We can now solve for y by multiplying both sides by




Therefore there are 375 girls in the school.