Step-by-step explanation:
Any complex number is of the form: 
where a is real part and B is imaginary part.
Therefore, in given complex number: 
7 is real part.
is imaginary part.
Hence, first two options are correct.
Last two options are incorrect because of the following reasons:
is coefficient of 
& not 
Given number is a difference of a real number and imaginary number & not a sum of a real number and imaginary number.
Answer:
36.36% probability that she gave birth to quadruplets
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcoes.
Desired outcomes:
Giving births to quadruplets.
She has 4 sets of quadruplets.
So 
Total outcomes:
At least 3 children(triplets).
7 sets of triplets and 4 sets of quadruplets.
So 
Probability:
36.36% probability that she gave birth to quadruplets
2, 5, 8, 11, 14 is an arithmetic sequence
Two numbers with factors 2,3,5 are 30 and 60.
when we multiply 2 x 3 x 5 = 30
we get answer 30 and then again multiply with the number that is greater than 1 is 2 and then we get 2 x 2 x 3 x 5 = 60
So the first two numbers with factors 2, 3 and 5 are 30 and 60.
I couldn’t figure that one out as well but I picked 80 square feet
