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3 years ago

Please help me with this

Mathematics

1 answer:

Elan Coil [88]3 years ago

8 0

Answer:

Step-by-step explanation:

L(d) = 189 - 7d

L(17) = 189 - 7·17 = 70 miles

After 17 days, 70 miles of track remain.

:::::

189 miles × (1 day)/(7 miles) = 27 days

It takes a total of 27 days to lay the track.

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0.66666667 as a fraction

Ierofanga [76]

Answer:

__________________________________________

The correct answer is: " $\frac{2}{3}$ " .

__________________________________________

Note: Let's assume that this given decimal value is really:

"0.66666666666666666....." ;

(non-terminating; but repeating the singing digit, "7" ; yet rounded to:

" 0.66666667 " ;

then: " 0.666... " = $\frac{666}{999}$ ;

= (666 ÷ 111) / (999 ÷ 111) ;

= 6/9 ;

= (6÷3)/(9÷3) ;

= 2/3 ;

= " $\frac{2}{3}$ "

→ which is our answer.

____________________________________________

Or: " 0.6666... " = 666 ÷ 999 = ? ;

using calculator :

= 0.66666667 ;

→ which is the "rounded off" number of "0.6666..." ;

— (infinitely repeating) ;

→ So 666 ÷ 999 =

→ " $\frac{666}{999}$ " ;

= " $\frac{2}{3}$ " ;

→ Either use a "fraction calculator" ;

or simplify as aforementioned.

____________________________________________

Hope this answer is helpful to you!

Best wishes to you in your academic pursuits

— and within the "Brainly" community!

____________________________________________

7 0

3 years ago

Read 2 more answers

If the null hypothesis of an experiment is “The true mean weight of the geese is greater than 40 pounds” what is the alternate h

Naddika [18.5K]

Answer:

The true average weight of geese is less than or equal to 40 pounds

Step-by-step explanation:

The null hypothesis and the alternative hypothesis are two mutually exclusive statements or hypotheses that are made about a population. The purpose is to find out if, through a study of the data, sufficient evidence is obtained to reject one and accept another

The null hypothesis is denoted as $H_0$ and the alternative hypothesis as $H_1$

As they are two mutually exclusive statements then if

$H_0$ : "The true average weight of the geese is greater than 40 pounds"

the alternative hypothesis must be the opposite of the null hypothesis

$H_1$ : "The true average weight of geese is less than or equal to 40 pounds"

4 0

3 years ago

the radius of the aluminum atom is 143pm. the radius of the aluminum atom is 54pm. by what percentage did the radius change as t

Dennis_Churaev [7]

Answer:

There was 62.23% change in radius as the ion formed.

Step-by-step explanation:

Given

Radius of Aluminium $(Al)$ atom = 143 pm

Radius of Aluminium $(Al^{3+})$ atom = 54 pm

Change is the radius = Radius of Aluminium $(Al)$ atom - Radius of Aluminium $(Al^{3+})$ atom = 143 -54 = 89

Now to find % Change is the radius we will divide Change is the radius by Radius of Aluminium $(Al)$ atom and multiply by 100 we get

% Change is the radius = $\frac{\textrm{Change is the radius}}{\textrm{Radius of Aluminium (Al) atom}} \times 100 = \frac{89}{143}\times100= 62.23\%$

Hence there was 62.23% change in radius as the ion formed.

4 0

4 years ago

What is the answer? To this question?

castortr0y [4]

Answer:

Step-by-step explanation:

f(x) = 30

30 = 1.8x -5.4

35.4 = 1.8x

x = 35.4/1.8

x = 19.666

4 0

3 years ago

Help help ASAP math math

Anni [7]

Answer:

-25

Step-by-step explanation:

f(-12) means x = -12

so you just plug it in the equation and solve for x

$f(x) = 3(-12)+11\\f(x) = -36+11\\f(x) = -25$

7 0

2 years ago