Answer:
The surface area of the structure is 
Step-by-step explanation:
we know that
The surface area of a sphere is equal to
In this problem we have
-----The radius is half the diameter
substitute
Answer:
−18f+6g
Step-by-step explanation:
Answer:
<h2>0i</h2>
Step-by-step explanation:
The imaginary number has form:
<em>a + bi</em>
<em>a</em><em> - real part</em>
<em>bi</em><em> - imaginary part</em>
<em>i</em><em> - imaginary unit (i = √-1)</em>
We have the number 9.
<em>9</em><em> is a real part</em>
An imaginary part is equal 0.
Therefore the imaginary part of number 9 is 0i.
I would love to answer if only i knew what the underlined digit is.
3x² + 10x + 6 = 0
x = -(10) ± √((10)² - 4(3)(6))
2(3)
x = -10 ± √(100 - 72)
6
x = -10 ± √(28)
6
x = -10 ± 2√(7)
6
x = -5 ± √(7)
3
x = -1²/₃ ± ¹/₃√(7)
5x² - 6x + 1 = 0
x = -(-6) ± √((-6)² - 4(5)(1))
2(5)
x = 6 ± √(36 - 20)
10
x = 6 ± √(16)
10
x = 6 ± 4
10
x = 3 ± 2
5
x = 3 + 2 or x = 3 - 2
5 5
x = 5 or x = -1
5 5
x = 1 or x = -0.2
2x² - 7x - 15 = 0
x = -(-7) ± √((-7)² - 4(2)(-15))
2(2)
x = 7 ± √(49 + 120)
4
x = 7 ± √(169)
4
x = 7 ± 13
4
x = 7 + 13 or x = 7 - 13
4 4
x = 20 or x = 6
4 4
x = 5 or x = 1.5
x² + 4x + 1 = 0
x = -(4) ± √((4)² - 4(1)(1))
2(1)
x = -4 ± √(16 - 4)
2
x = -4 ± √(12)
2
x = -4 ± 2√(3)
2
x = -2 ± √(3)
2
x = -1 ± ¹/₂√(3)
x = -1 + ¹/₂√(3) or x = -1 - ¹/₂√(3)
