Therese filled a rectangular pool with water. The pool measured 214 yards long, 2 yards wide and 3 yards tall. If the pool was f
2 answers:
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Answer:
slope =
Step-by-step explanation:
1) Calculate the slope using slope formula, . Use the two points given, substitute their x and y values into the formula, and solve.
Thus, the slope is .
Answer:
C
Step-by-step explanation:
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 + y² + 4x - 10y + 20 = 0
Collect x and y terms and subtract 20 from both sides. that is
x² + 4x + y² - 10y = - 20
To obtain standard form use the method of completing the square
add ( half the coefficient of the x/y term )² to both sides
x² + 2(2)x + 4 + y² + 2(- 5)y + 25 = - 20 + 4 + 25
(x + 2)² + (y - 5)² = 9 ← in standard form
with centre = (- 2, 5) and r = = 3 → C