Answer:
Number of blue marbles = 86.
Step-by-step explanation:
Let number of blue marbles = x, then the number of red marbles = 106-x.
From the second relation given in the question:-
x = 4(106 - x) + 6
Solving for x:-
x = 424 - 4x + 6
5x = 430
x = 86 blue marbles.
His brother is 2 years old
I highly believe that the answer is 35
Answer:
a. z-score = -1.2
b. The age 23 years old is -1.2 standard deviations below the mean
c. The age is not unusual
Step-by-step explanation:
a. Transformation to z-score
Mathematically;
z-score = (x - μ)/σ
where σ and μ are the standard deviation and the mean respectively.
From the question, x = 23, μ = 27.2 and σ = 3.5
Let’s put these into the equation;
z-score = (23-27.2)/3.5 = -1.2
b. Interpretation of result
The interpretation is that 23 years old is -1.2 standard deviations below the mean
c. Determination
The age is not unusual. This is because any z-value below -2 or above 2 is considered unusual
-1.2 is above -2 and thus it is not unusual
Answer:
(p - 8)(p - 9)
Step-by-step explanation:
We need 2 numbers whose product is + 72 and whose sum = -17.
They are -8 and -9
