Answer:
7/18
Step-by-step explanation:
To find the difference between numbers, subtract. Since we have fractions, we need a common denominator to be able to subtract.
The LCD of 2 and 9 is 2 * 9 = 18
18/2 = 9
18/9 = 2
1/2 - 1/9 = (9 * 1)/(9 * 2) - (2 * 1)/(2 * 9) = 9/18 - 2/18 = 7/18
Answer:
-13 or 13
Step-by-step explanation:
Since we are looking for the square root of 169, we realize that 13 multiplied by itself equals 169. Negative 13 does the same, so it is the answer.
Answer:
An applicant must score a minimum of 128
Step-by-step explanation:
To solve this question, we make use of the z-score formula.
Z = (X - mean)/standard deviation
Firstly, let’s list out the parameters from the question. From the question, we can deduce that:
Z = 1.5
X = ?
Mean = 110
Standard deviation =12
1.5= (X-110)/12
18 = X - 110
X = 110 + 18
X = 128
