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adelina 88 [10]
3 years ago
10

Simplify the expression. 2u + 8u - 5u

Mathematics
1 answer:
MAXImum [283]3 years ago
3 0

Answer:

= 5u

Step-by-step explanation:

You combine like terms

( 2u+ 8u = 10u )

( -5u + 10 u =5u)

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2 years ago
What is the common ratio and explicit formula for -2,6,-18,54?
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Answer:

The explicit formula for a given geometric sequence is of the form

a_{4} =\frac{1}{(a_{1})^4}

Step-by-step explanation:

Given sequence is {\{-2,6,-18,54}\}

Let a_{1}=-2,a_{2}=6,a_{3}=-18,a_{4}=54

To find the common ratio r:

r=\frac{a_{2}}{a_{1}}

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Therefore r=-3

r=\frac{a_{3}}{a_{2}}

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Therefore r=-3

Therefore common ratio is -3

Therefore given sequence is geometric sequence.

The explicit formula for a geometric sequence is a_{n}=a_{1}^{r-1}, where common ratio is r.

From given sequence we are having  r=-3

Therefore the explicit formula for a given geometric sequence is of the form a_{4} =a_{1}^{-3-1}

a_{4} =a_{1}^{-4}

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6 0
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Answer:

1.70

Step-by-step explanation:

15.30 ÷ 9 = 1.70

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I hope this helps

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