Answer: 
Step-by-step explanation:
If we model the clock as a circumference, we will be able to see that a complete turn (the whole circumference) represents 
, hence:
Now we have to find the equivalence between 
and 
and degrees. So, in order to do this, we can make a Rule of Three:
For :
For :
Adding both angles:
Answer:
Area of a trapezoid = ½(a + b)h, where a and b are the lengths of the parallel sides and h is its height.
From your information 20 = ½(2z + 3 + 6z – 1)z = ½(8z + 2)z = z(4z + 1)
Solve 20 = 4z² + z which is 0 = 4z² + z – 20 using the quadratic formula
Step-by-step explanation:
3x^2+33x+30=0
3(x^2+11x+10)=0
3(x+10)(x+1)=0
x=-10,-1
Answer:
They partially dissocate in water ( first choice)
