Answer:
Pretty sure it is 18 girls
Step-by-step explanation:
81 girls: 72 boys
72 boys /16 boys = 4.5
81 girls / 4.5= 18 girls
so 18 girls:16 boys
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Answer:
nojjiiiiiiiiiiiiii9o in jj ko o in k
This technique is valid only when the coefficient of x2 is 1.
1) Transpose the constant term to the right
x2 + 6x = −2.
<span> 2) <span>Add a square number to both sides -- add the square of half the coefficient of x. In this case, add the square of half of 6; that is, add the square of 3, which is 9:</span></span>
x2 + 6x + 9 = −2 + 9.
The left-hand side is now the perfect square of (x + 3).
(x + 3)2 = 7.
3 is half of the coefficient 6.
That equation has the form
<span><span><span>a2</span> = b</span> which implies<span>a = <span>±.</span></span> Therefore,<span><span>x + 3</span> = ±</span> <span>x = <span>−3 ±.</span></span></span>
That is, the solutions to
x2 + 6x + 2 = 0
Answer:
This is an Exponential decay
The Exponential decay rate = 35%
Step-by-step explanation:
Looking at that the above question, it is an Exponential decay
The formula for Exponential decay is:
A(t) = Ao (1 - r)^t
In the above question:.
A(t) = 1950 (0.65)^t
r = rate
Hence:
(1 - r) = (0.65)
1 - r = 0.65
r = 1 - 0.65
r = 0.35
Converting to percentage
0.35 × 100
= 35%
Hence, the Exponential decay rate is 35%
