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ad-work [718]
3 years ago
12

You discovered 1000 grams of an unknown element called Coolium 23 that has a half life 23 days. How long will it take for you to

have 600 grams remaining.
Mathematics
1 answer:
Trava [24]3 years ago
4 0

Answer:

13.8 days

Step-by-step explanation:

In this case we can solve it by means of a rule of three, knowing the amount of life for 1000 grams, it must be proportional for 600 grams, like this:

grams   days

 1000     23

 600        x

x = 600 * 23/1000

x = 13.8

which means that for the 600 grams it would be an average life of 13.8 days.

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The answer is 14% or 0.14
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3 years ago
Which statement justifies why ∠EBC measures 90°?<br><br> Given: angles ABD and DBC are complementary
luda_lava [24]

The statement that justifies why ∠EBC measures 90° is that the  sum of the measures of two complementary angles is 90 degrees.

<h3>What are  complementary angles?</h3>

The  complementary angles are angles that when we find their  sum  it will be  equal to 90 degrees and that is why its been regarded as the  complementary angles.

We can see that m∠ABD and m∠DBC are complementary, because m∠ABD + m∠DBC=90°

Therefore, The statement that justifies why ∠EBC measures 90° is that the  sum of the measures of two complementary angles is 90 degrees.

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6 0
2 years ago
Help me pls.............
labwork [276]
10x - 7y = -1....multiply by -1 to make that -7y positive
-2x - 7y = -25
------------------
-10x + 7y = 1 (result of multiplying by -1)
-2x - 7y = -25
-----------------add
-12x = - 24
x = 2

-2x - 7y = -25
-2(2) - 7y = -25
-4 - 7y = -25
-7y = - 25 + 4
-7y = - 21
y = 3

solution is : (2,3)
6 0
3 years ago
Is the following relation a function?xy1−21−3213−2
Aleksandr-060686 [28]

Answer: 5

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
I’ll give 36 points to the person who answers this please
GREYUIT [131]

Hello!

These | | you are seeing means absolute value. Absolute value is the distance a number is from 0. For example, the absolute value of -3, or |-3|, would be 3 as -3 is 3 away from 0.

Therefore, we can look at these two operations. |-12|, and |8|

|-12| would equal 12, as -12 is 12 away from 0. |8| would equal 8, as 8 is 8 away from 0. 12 is greater than 8.

Therefore, your answer is the second choice, |-12|>|8|.

Hope this helps!

8 0
3 years ago
Read 2 more answers
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