2 years ago

Simplify the problem 7x+4(6-x)+28

Mathematics

1 answer:

nignag [31]2 years ago

8 0

Answer: 3

Step-by-step explanation:

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Decimal of 0.516÷4 With process

steposvetlana [31]

Answer: 0.129
explanation:

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3 years ago

Evaluate: 20 Σ 4(8/9)^n-1 = [?] 1 Round to the nearest hundredth.

lianna [129]

Answer:

32.59 (nearest hundredth)

Step-by-step explanation:

Geometric sequence

General form of a geometric sequence: $a_n=ar^{n-1}$

(where a is the first term and r is the common ratio)

Given:

$\displaystyle \sum^{20}_{n=1} 4 \left(\dfrac{8}{9}\right)^{n-1}$

Therefore:

a = 4
r = 8/9

Sum of the first n terms of a geometric series:

$S_n=\dfrac{a(1-r^n)}{1-r}$

To find the sum of the first 20 terms, substitute the found values of a and r, together with n = 20, into the formula:

$\implies S_{20}=\dfrac{4\left(1-\left(\frac{8}{9}\right)^{20}\right)}{1-\left(\frac{8}{9}\right)}$

$\implies S_{20}=32.58609013...$

$\implies S_{20}=32.59\:\: \sf (nearest\:hundredth)$

7 0

1 year ago

Read 2 more answers

A Hindu might try to live a virtuous life to _____________.

DIA [1.3K]

The answer is B. Hindus believe in the concept of reincarnation, so obtaining good karma by living a virtuous life will help a person to be reborn of a higher caste (a higher position in the social order) in their next life.

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3 years ago

Can anyone Help me please

m_a_m_a [10]

The partial variation is A

7 0

3 years ago

Please i need help ! its due today ! Class A has 10 pupils and class B has 17 pupils.

Rudiy27

Answer:

The mean score is 87

Step-by-step explanation:

79x2=158

158-71=87

6 0

1 year ago