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Dafna11 [192]
3 years ago
6

Element X decays radioactively with a half life of 13 minutes. If there are 830 grams of Element X, how long, to the nearest ten

th of a minute, would it take the element to decay to 20 grams?
Mathematics
1 answer:
Nonamiya [84]3 years ago
4 0

Answer:

26.92 min

if I'm not wrong!

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What is the value of E?
kozerog [31]
Hello!

∠E and the angle measuring 119 degrees (we'll refer to this as ∠A) can be classified as supplementary angles. Supplementary angles are two angles whose measures add to a sum of 180 degrees (a straight line). Therefore, we can conclude that sum of ∠E and ∠A is 180 degrees. We can use this information to create the following equation:

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Now subtract 119 from both sides of the equation:

∠E = 61

We have now proven that ∠E is equal to 61 degrees.

I hope this helps!
8 0
3 years ago
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The system of linear equations 5x+2y = 3 and x+y = -1 is graphed below.What is the solution to the system of equations?
Kazeer [188]

Answer:

<h2>C. (3, -4)</h2>

Step-by-step explanation:

If the system of linear equations is graphed, then the solution is the intersection of lines.

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7 0
3 years ago
Grace bought a property valued at $200,00.00 and 20% down and a mortgage amortized over 10 years. She makes equal payments due a
BlackZzzverrR [31]

Answer:

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7 0
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Helppppppppppp again ! Pls
galina1969 [7]
7 pls brainliest me have a good day
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An angle that has a supplement also has a complement. Always, sometimes, or never?
Assoli18 [71]
So the problem ask to what could be the right choice among the three that could support the said statement in you problem that tells that an angle that has a supplement also has a complement and the best answer would be that it is ALWAYS be TRUE. I hope you are satisfied with my answer 
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