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ziro4ka [17]
3 years ago
11

How do we express twice the sum of b and 4

Mathematics
1 answer:
jolli1 [7]3 years ago
4 0

Answer:

2(b+4) or 2b + 8

Step-by-step explanation:

(b + 4)

2 * (b+4)

Multiply 2 by b and 4

2b + 4*2 =

2b + 8

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Step-by-step explanation:

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Assume that when an adult is randomly​ selected, the probability that they do not require vision correction is 23​%. If 6 adults
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 P(X = 2) = 0.27894

Step-by-step explanation:

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Solution:

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Ten children in a kindergarten class own a dog. Fourteen children in the class do not own a dog. Find the ratio of the number of
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The question is:
saul85 [17]
f(x) = \sqrt{x+1} \\ y = \sqrt{x+1} \ or \ y^2 = x+1 \ or \ x = y^2 - 1 \\ Therefore, \ f^{-1}(x)=x^2 - 1

(fof^{-1})(a) = f(f^{-1}(a))=f(a^2-1) \\ =\sqrt{a^2-1+1}=\sqrt{a^2}=a \\  \\ (f^{-1}of)(a)=f^{-1}(f(a))=f^{-1}(\sqrt{a+1})= \\ (\sqrt{a+1})^2-1 = a+1-1 = a

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