Sin(x) = cos(90-x) , so the answer is 0.83 * 0.55
Answer:
(0, -3)
Step-by-step explanation:
Here we'll rewrite x^2+y^2+6y-72=0 using "completing the square."
Rearranging x^2+y^2+6y-72=0, we get x^2 + y^2 + 6y = 72.
x^2 is already a perfect square. Focus on rewriting y^2 + 6y as the square of a binomial: y^2 + 6y becomes a perfect square if we add 9 and then subtract 9:
x^2 + y^2 + 6y + 9 - 9 = 72:
x^2 + (y + 3)^2 = 81
Comparing this to the standard equation of a circle with center at (h, k) and radius r,
(x - h)^2 + (y - k)^2 = r^2. Then h = 0, k = -3 and r = 9.
The center of the circle is (h, k), or (0, -3).
Step-by-step explanation:
Daquan's age = x
Juan's age = x
Phillipa's age = x + 3
x + x + x + 3 = 36
3x + 3 = 36
3x = 36 - 3
3x = 33
x = 33 ÷ 3
x = 11
the twins are 11 years old
Answer:
4/25
Step-by-step explanation:
(-2/5) ^2
This means
( -2/5) * (-2/5)
4/25
