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Mashcka [7]
3 years ago
14

En una prueba de duración para determinar la vida útil de un nuevo tipo de lámpara lanzada al mercado, los datos de la muestra s

e distribuyeron de manera casi normal. Se calculó una vida útil
promedio de 7000 hrs. y una desviación de 520 hrs. Halla el porcentaje de lámparas que tendrán
una vida útil
a) entre la media y 7600hrs.
b)entre 6500 hrs y 7600 hrs.
c) mas de 7600
Mathematics
1 answer:
diamong [38]3 years ago
6 0

Answer:

no habla espenol :((

Step-by-step explanation:

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Please help (algebra)
Serggg [28]

Answer:

0.1

Step-by-step explanation:

0.3 x 7= 2.1

2.1 - 2= 0.1

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2 years ago
The graph shows the amount of money earned by two different workers.
Masteriza [31]

Answer:

The asnwer is B

Step-by-step explanation:

HOPE YOU DO WELL

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3 years ago
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What are the terms in the expression 2x−4y+8 ?
vazorg [7]

Answer:

A. 2x, -4y, and 8

Step-by-step explanation:

If there is a minus sign in front of the 4 (-), add that to the expression. What you are just simply doing is separating the numbers up. For example:

12x - 8y + 4x

Now here, you have two of the same variables (x, y, etc). So, what you do is look at the last number that has the same variables, which is 4, and look at what the problem you will be solving, which is addition. So, very simply, you add then together!

12× + 4× = 16×

As you can see I kept the same variable. This is because, well, it is the same! Simply, just substitute in the 16× with the 8y. Now here is the tricky part, for some people. Do you see that there is a negative sign in front of the 8 (-)? Well! You have to substitute that in with the expression. No adding this or anything, just simply slide it next to the 16× because, we can not add nor subtract it with the 8y just because it has a different variable.

Your example answer would be: 16× - 8y

Hope this helps!

P.S. if you think this helped you at all, Brainliest me if ya want to. Have a great day!

5 0
2 years ago
Evaluate the expression shown below and write your answer as a fraction in simplest form.​
Amiraneli [1.4K]

Answer:

1/2

Step-by-step explanation:

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Norma-Jean [14]

Here's the picture With the work

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3 years ago
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