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4 years ago

13

Please give a simple summary of log functions.

1 answer:

Bess [88]4 years ago

3 0

Logarithmic functions are the inverses of exponential functions. The inverse of the exponential funtion y = ax is x = ay. The logarithmic function y = logax is defined to be equivalent to the exponential equation x = ay. A logarithm is really nothing more than an exponent.

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3 years ago

What are the values of a and b

makvit [3.9K]

Answer:

$\large\boxed{B.\ a=8,\ b=4\sqrt5}$

Step-by-step explanation:

We have three similar triangles:

$\triangle ABC\sim\triangle DBA\sim\triangle DAC$

therefore the sides are in proportion:

$\dfrac{AD}{CD}=\dfrac{BD}{AD}$

We have AD = a, CD = 16 and BD = 4. Substitute:

$\dfrac{a}{16}=\dfrac{4}{a}$ <em>cross multiply</em>

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and other proportion:

$\dfrac{AB}{BC}=\dfrac{BD}{AB}$

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$\dfrac{b}{20}=\dfrac{4}{b}$ <em>cross multiply</em>

$(b)(b)=(20)(4)\\\\b^2=80\to b=\sqrt{80}\\\\b=\sqrt{16\cdot5}\\\\b=\sqrt{16}\cdot\sqrt{5}\\\\b=4\sqrt{5}$

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3 years ago

What does 4 + 5 equal

Svet_ta [14]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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nikklg [1K]

Answer:

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Step-by-step explanation:

3x+4y=15

3x+4y=7

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