(x²+4x+4)-4+(y²-6y+9)-9=-4
(x+2)²+(y-3)²=9
(x+2)²+(y-3)²=3²<span>
Circles follow the form: (x-a)+(y-b)=r</span><span>²
</span><span>Therefore the center of the circle is at (-2,3)
and the radius is 3.</span>
Ratio of boys to girl is 8:7 and girls to boys is 7:8
<h3>
Answer:</h3>
(5/7, 12/7) <- I think you meant to type that. Its the first one
<h3>
Step-by-step explanation:</h3>
Step 1: Substitute y=x+1 in for y in 5x + 2y = 7
5x + 2(x+1) = 7
Step 2: Solve it
5x + 2x + 2 = 7
7x + 2 = 7
- 2 - 2
7x = 5
--- ---
7 7
x = 5/7
Step 3; Plug x into y=x+1
y = 5/7 + 1
y = 12/7
Answer:
Pi is a irrational number
Step-by-step explanation:
Pi is an irrational number because it never ends it keeps going on and one.
Pi is also 3.141592654.............. never ends
