The answer is -9+9i because we combine like terms.
(-7)-2= (-7)+(-2)=-9
(3i)-(-6i)= (3i)+(6i)=9i
hope this helps! :)
Answer:

Step-by-step explanation:
Given
The list of options
Required
Which represents the strongest correlation.
When
, it is considered to be strong.
Compare this condition with the given options, we're left with:


The above r-values show strong correlation.
However
is stronger
because 
Hence;
answers the question
Answer:
Jack must Answer minimum 28 question correctly in order to get A in Science.
Step-by-step explanation:
Given:
Percentage required = 92%
Total Number of question = 30
We need to find the number of Question answer correctly.
Solution:
number of Question answer correctly be 'x'
So we can say that;
number of Question answer correctly divided by Total Number of question multiplied by 100 should be greater than or equal to percentage required.
framing in equation form we get;

Now Dividing both side by
we get;

Hence Jack must Answer minimum 28 question correctly in order to get A in Science.
X=1 1/3 is that helpful because I don’t know if it’s right
Double
from initial amont of P to final amount of 2P
so
2P=P(1.071)^time
divide both sides by P
2=1.071^time
take the ln of both sides
ln2=timeln1.071
divide both sides by ln 1.071
(ln2)/(ln1.071)=time needed
using calculator
10.1052=time needed
about 10.1 hours