Answer:
see explanation
Step-by-step explanation:
I will begin with part two, first.
The equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius.
Given
x² - 18x + y² - 10y = - 6
Using the method of completing the square
add ( half the coefficient of the x/ y terms )² to both sides
x² + 2(- 9)x + 81 + y² + 2(- 5)y + 25 = - 6 + 81 + 25, that is
(x - 9)² + (y - 5)² = 100 ← in standard form
with centre = (9, 5 ) and r =
= 10
Answer:
14π
Step-by-step explanation:
Area πr^2= 49π sq cm
so r= 7 cm
perimeter= 2πr= 14π
Answer:100
Step-by-step explanation:
0.50x+25 would be the expression form of the situation
Answer:
The answer is 7.5
Step-by-step explanation:
BODMAS:
2 × (5.6 ÷ 2.8)+ 3.5
= 2 × 2 + 3.5
= 4 + 3.5
= 7.5
(Correct me if i am wrong)