Answer:
39˚
Step-by-step explanation:
The whole thing is a right angle, and we know that because of the square thing at the top.
These two angles are complementary, so we can subtract 51 from 90.
90-51=39˚
Answer: b. helium nucleus
Helium nucleus is the particle that is being emitted in an alpha radiation. This helium nucleus then transforms and becomes decays that are also known as alpha decays. The alpha particle maybe similar to helium nucleus however, it does not have electrons surrounding it.
It is -129/500
I hope this is the answer you are looking for
Answer:
sow ajaujqh
Step-by-step explanation:
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I believe the first one 12+ 6 + 15 = 12 + 15 + 6 is your answer, since you are just moving things around
hope this helps
