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koban [17]
3 years ago
11

How many solutions exist for the given equation? 0.75(x+40)=0.35(x+20)+0.35(x+20)please hurry

Mathematics
1 answer:
larisa86 [58]3 years ago
3 0

Answer:

only one

Step-by-step explanation:

0.75x+30=0.35x+7+0.35x+7

x=-320

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\large\boxed{\text{sixth term is equal to}\ \dfrac{1}{1024}}

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<h2>It's not a geometric sequence.</h2>

If a_3=-\dfrac{1}{16} then the common ratio is r=\dfrac{-\frac{1}{16}}{\frac{1}{4}}=-\dfrac{1}{16}\cdot\dfrac{4}{1}=-\dfrac{1}{4}

Put to the explicit formula:

a_n=-1\left(-\dfrac{1}{4}\right)^{n-1}

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\dfrac{1}{4^n}=\dfrac{1}{4^6}\iff n=6

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