Answer:
A
Step-by-step explanation:
The theorem we use for this is

Solve for d.



A is the answer
Answer:
(x+2)²+(y+2)²=36
Step-by-step explanation:
given r=6
center is (-2,-2)
the equation becomes
(x-(-2))²+(y-(-2))² = 6²
on simplifying we get the answer
Let the cost of a chicken be x and the cost of a duck, y, then
50x + 30y = 550 . . . (1)
44x + 36y = 532 . . . (2)
(1) x 6 ⇒ 300x + 180y = 3,300 . . . (3)
(2) x 5 ⇒ 220x + 180y = 2,660 . . . (4)
(3) - (4) ⇒ 80x = 640
⇒ x = 640 / 80 = 8
From (1): 50(8) + 30y = 550
⇒ 30y = 550 - 400 = 150
⇒ y = 150 / 30 = 5
Therefore, the price of a chicken is $8 and the price of a duck is $5.
Answer:
1975------ 4.8%
1990 ------ 11.48%
1985 ------ 8.51%
Step-by-step explanation:
Given
if 0 ≤ t < 10
if 10 ≤ t ≤ 30
Where
t:=0 implies year = 1970
Solving (a): Beginning of 1975.
First, we calculate the value of t


This falls in the range: 0 ≤ t < 10
So:



Solving (b): Beginning of 1990.


This falls in the range: 10 ≤ t ≤ 30
So:



Solving (c): Beginning of 1985


This falls in the range: 10 ≤ t ≤ 30
So:




Answer:
15,12,6
Step-by-step explanation: