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Paraphin [41]
3 years ago
11

A number sentence is said to be true if both numerical expressions are

Mathematics
1 answer:
Igoryamba3 years ago
6 0
If both expressions are equivalent (that is when both evaluate to the same number)
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The rivers depth is three meters greater than its width. two time the rivers depth is equal to six meters more than twice its wi
Gre4nikov [31]

Answer:

d = w + 3 (first equation)

2d = 2w + 3 (second equation).

The second equation is equivalent to the first one.

In other words, two equations carry the same information as the first one, not more.

In the language of linear algebra, the system is dependent

7 0
3 years ago
Katie has read 34% of a book. If she read 85 pages, does she have more than or fewer than 125 pages left to read? Explain
mestny [16]
Determine the percent of book she hasn't read.
percent = 100% - percent she has read
percent = 100% - 34%
percent = 66%
She hasn't read 66% of the book.

Find the amount of page she hasn't read.
page = $ \dfrac{\text{percent hasn't read}}{\text{percent has read}} \times\ \text{page has read}$
page = $ \dfrac{66\%}{34\%} \times\ 85$
page = $ \dfrac{66}{34} \times\ 85$
page = \dfrac{5,610}{85}
page = 165

The number of page she hasn't read is 165. It's more than 125.
3 0
4 years ago
∑∞ n=1 (n^2n)/(1+n)^(3n)
kvv77 [185]

Answer:

Given the series,

∑ ∞ n = 1 − 4 ( − 1 / 2 ) n − 1

I think the series is summation from n = 1 to ∞ of -4(-1/2)^(n-1)

So,

∑ − 4 ( − ½ )^(n − 1). From n = 1 to ∞

There are different types of test to show if a series converges or diverges

So, using Ratio test

Lim n → ∞ (a_n+1 / a_n)

Lim n → ∞ (-4(-1/ 2)^(n+1-1) / -4(-1/2)^(n-1))

Lim n → ∞ ((-4(-1/2)^(n) / -4(-1/2)^(n-1))

Lim n → ∞ (-1/2)ⁿ / (-1/2)^(n-1)

Lim n→ ∞ (-1/2)^(n-n+1)

Lim n→ ∞ (-1/2)^1 = -1/2

Since the limit is less than 0, then, the series converge...

Sum to infinity

Using geometric progression formula

S∞ = a / 1 - r

Where

a is first term

r is common ratio

So, first term is

a_1 = -4(-½)^1-1 = -4(-½)^0 = -4 × 1

a_1 = -4

Common ratio r = a_2 / a_1

a_2 = 4(-½)^2-1 = -4(-½)^1 = -4 × -½ = 2

a_2 = 2

Then,

r = a_2 / a_1 = 2 / -4 = -½

S∞ = -4 / 1--½

S∞ = -4 / 1 + ½

S∞ = -4 / 3/2 = -4 × 2 / 3

S∞ = -8 / 3 = -2⅔

The sum to infinity is -2.67 or -2⅔

<h2>Step-by-step explanation: PHEW THAT TOOK A WHILE LOL IM A FAST TYPER</h2>

3 0
3 years ago
Find the volume of this cone.
RSB [31]

Step-by-step explanation:

volume =  \frac{1}{3} \pi {r}^{2} h \\  =  \frac{1}{3}  \times 3 \times  {2.5}^{2}  \times 6 \\  = 37.5 \:  {cm}^{3}

7 0
3 years ago
Read 2 more answers
What does isomorphic mean in leanera algebra?
defon
Two vector spaces V and W are said to be isomorphic if there exists an invertible linear transformation (aka an isomorphism) T from V to W.
4 0
3 years ago
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