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RSB [31]
2 years ago
10

10. Un átomo de potasio tiene 19 protones en el núcleo y 20 neutrones. A partir de estos datos, a) ¿Cuál será su número atómico?

7YGº
Mathematics
1 answer:
hram777 [196]2 years ago
6 0

Answer:

translate this to English and I'll help!(:

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What kind of decimal is an irrational number give an example
Nana76 [90]

Answer:

An irrational decimal is a decimal that cannot be written in fraction form

Ex: Pi or any decimal that keeps going and doesn't repeat

Step-by-step explanation:

I would give you more examples but they are all really long numbers and go on forever.

3 0
2 years ago
Read 2 more answers
A pair of vertical angles has measures (3x+4)° and (7x-9)°<br> What is the value of x?
Andrei [34K]
Since they are vertical they are equal to each other.

3x + 4 = 7x - 9
4 = 4x - 9
13 = 4x 
3.25 = x

So the value of x is 3.25.

Hope this helps :)
5 0
2 years ago
Solve the inequality -8x - 10 &gt; 7x + 20.
frosja888 [35]
The answer to your inequality is x \ \textless \  -2
5 0
2 years ago
Read 2 more answers
2x-4<br> 30<br> 15x - 30<br> PAP
Alex787 [66]

Answer:

\frac{2}{25}

Step-by-step explanation:

Given expression,

\frac{\frac{2x-4}{30} }{\frac{15x-30}{18} }

=>\frac{\frac{2(x-2)}{30} }{\frac{15(x-2)}{18} }

We see that (x-2) is common in both numerator and denominator

hence canceling out we get:-

\frac{2*18}{30*15}=\frac{2}{25}

Answer=\frac{2}{25}

4 0
3 years ago
2 × 10^12 red blood cells have a total mass of 90 grams.
galina1969 [7]

Answer:

2×10¹² cells → 90 g

mass of 1 red blood cell : 90÷(2×10¹²) = 45×10^-12 g = 4.5×10^-11 g

5 0
2 years ago
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