Answer:
Step-by-step explanation:
Bacteria is helpful because it helps protect the cells in your intestines. Its, harmful because itI can cause a disease in your lungs.
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Answer with Step-by-step explanation:
Let 
Substitute n=2
Then 

Hence, P(n) is true for n=2
Suppose that P(n) is true for n=k >1

Now, we shall prove that p(n) is true for n=k+1

LHS

Substitute the value of P(k)






LHS=RHS
Hence, P(n) is true for all n >1.
Hence, proved
Answer:
∠ 1 = 120°
Step-by-step explanation:
Note that ∠ Q and ∠ R are congruent, that is both 30°, thus
∠ 1 = 180° - (30 + 30)° = 180° - 60° = 120°
Both answers are C for #4 and #5