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3 years ago

-3(x+5)=3(x-1) How to solve

Mathematics

1 answer:

Luden [163]3 years ago

7 0

Answer:

x = -4

Step-by-step explanation:

-3 (x + 5) = 3 (x - 1) <Start by distributing the -3 and 3 (don't forget to distribute . the negative symbol!

-3x - 15 = 3x - 3

+3x +3x <Add 3x on both sides

-15 = 3x - 3

+3 +3 <Add 3 on both sides

-12 = 3x <Divide by 3 on both sides

-4 = x

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Answer:

0.5

Step-by-step explanation:

Let D be the event of selecting a marble with dots.

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3 years ago

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2 years ago

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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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2 years ago

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Step-by-step explanation:

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