Answer:
oxygen-13
Step-by-step explanation:
Consists of 8 protons and electrons and 5 neutrons
Answer:
C. R = 17.9 degrees
Step-by-step explanation:
We have a rectangle triangle with the adjacent side and the opposite side (neither of which are the hypotenuse).
The relation between those elements is the tangent:

So, to isolate the angle, we modify the formula as such:

If we round 17.87 degrees to the tenth... we get 17.9 degrees.
You haven't included enough information for the question, but assuming that a and b are the same then a is 4 and b is 4
9: the answer is 4 to 13
10: the answer is 6 to 13
Answer:
-1.66666666667 yards
Step-by-step explanation:
15x+12=6x-3
subtract 6x on both sides
9x+12=-3
subtract 12 on both sides
9x=-15
x=-1.6666666666667