4 years ago

Help i need answers fasr plzzz

Mathematics

1 answer:

Vladimir79 [104]4 years ago

7 0

Answer:

the answer is z<-4 the second graph on the picture

Step-by-step explanation:

-28/7=-4 and because its less than only not less than and equal to it's an open circle

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Ganezh [65]

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Step-by-step explanation:

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3 years ago

When and how do you use logarithms to solve exponential equations? give an example of an exponential equation that does not requ

tatuchka [14]

$\bf 5^{x+3}=\cfrac{1}{125}\implies 5^{x+3}=\cfrac{1}{5^3}\implies 5^{x+3}=5^{-3}
\\\\\\
\textit{because the bases are the same, the exponents must also be the same}
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x+3=-3\implies \boxed{x=-6}\\\\
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3^x=4^{2x}\implies log(3^x)=log(4^{2x})\implies xlog(3)=(2x)log(4)
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\cfrac{x}{2x}=\cfrac{log(4)}{log(3)}\implies \cfrac{1}{x}=\cfrac{log(4)}{log(3)}\implies \cfrac{log(3)}{log(4)}=x\implies \boxed{0.79248125\approx x}$