Answer:
B
Step-by-step explanation:
The standard form of the equation of a circle is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Here (h, k) = (2, - 9) and r = 3, thus
(x - 2)² + (y - (- 9))² = 3², that is
(x - 2)² + (y + 9)² = 9 → B
18.4 cm
Using Pythagoras rule:
Hypotenuse =
= 18.4 cm
-22.25
-31.7+4.5(2.1)
-31.7+9.45
Answer: x= 3
15x-25+2=22
15x-25=25
15x=50
x=3.333333
x=3