Answer:
The equivalent expression is 
A is correct
Step-by-step explanation:
We are given two complex number and need to multiply it. To find equivalent fraction.
Using Binomial product property: (a+b)(c+d)=ab+ad+bc+bd
Combine the like term and simplify
Hence, The equivalent expression is
Mean = Sum of all the observations/ Number of observations = (87+46+90+78+89)/5 = 78
Variance = SD^2 ------ SD = Standard deviation
It means that with Variance, square root is never taken.
Therefore,
Variance = Summation of square of differences between observation and the mean divided by the number of observations.
That is,
Variance = {(87-78)^2 + (46-78)^2 + (90-78)^2 + (78-78)^2 + (89-78)^2}/5 = 274
Answer:
Yes he has enough fence to go round the flower bed.
Step-by-step explanation:
1 yard = 3 feet
25 feet = 25/3 = 8.33 yards
Yes he has enough fence to go round the flower bed.
Try this solution (see the attachment, it is consists of 3 steps).
