3. write an equation for the circle whose center is at (9,0) and has radius 7.

x²+y²-18x+81-49= 0

Step-by-step explanation:

For a circle with radius (r) and b center (a,b), the general form of the circle will be;

(x-a)²+(y-b)² = r²

According to the question, center given is (9,0) and radius is 7

From the value of the center,

a = 9 b = 0

Substituting this values into the general equation of the circle, this gives;

(x-9)²+(y-0)² = 7²

x²-18x+81+y² = 49

Re arranging

x²+y²-18x+81-49= 0 which gives the required equation.

answer: it's upside down and i can't read it

step-by-step explanation:

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.