Answer:
38 is your answer :)
Step-by-step explanation:
So what you want to do is P.E.M.D.A.S (parenthesis, exponets, multiplication/division, addition/subtraction) * whatever comes first always do it in order*
3^2+12/ (6-3) x 8
6-3 = 3
3^2+12/(3)*8
3^2+4*8
6+4*8 =32 and 32+6 = 38
70 or +70
To represent a positive integer
Answer:
-5x - 8y = -5
Step-by-step explanation:
Whenever we two equations, we are essentially just adding the left sides up and then the right sides up. Here, let's write these into one whole big equation:
(4x - 4y) + (-9x - 4y) = -2 + (-3)
Taking the parentheses out, we have:
4x - 4y - 9x - 4y = -2 - 3
Combine like terms:
4x - 9x - 4y - 4y = -5
-5x - 8y = -5
Hope this helps!
Answer:
mean=4.44
standard deviation=1.67
Step-by-step explanation:
The mean and standard deviation for the number of erroneous returns per batch can be calculated using binomial distribution. The binomial distribution is used because
i) There are one of two possible outcomes( error or no error) that can be categorized into success and failure.
ii) The experiment is repeated fix number of times 12.
iii) The probability of success remains constant at each trial i.e. 37%
iv) The trails are independent.The mean and standard deviation of binomial distribution are np and √npq
Here, n=12, p=0.37 and q=1-0.37=0.63
mean=12*0.37=4.44
standard deviation=√12*0.37*0.63=√2.8=1.67
R² - 6r - 8 = 0
r² = 7.12
r = -1.12
