Answer:
//
Step-by-step explanation:
Bill's answer is wrong because timesing 150 by 1.3 is increasing the number by 30%, not 3%
If he wanted to use this method, he would have ti times 150 by 1.03
Answer:
7 3/5
Step-by-step explanation:

Answer:
w=-1/6 or w=-3
Step-by-step explanation:
Substitute the value of x and y into the first equation and solve for w:

Solve for w with the quadratic formula:

After simplifying, we get either w=-1/6 or w=-3.
Not sure if w needs to satisfy all conditions while maintaining everything as real numbers, because if w=-3, then x is an imaginary number. But both values work just as fine.
20 would be 20% of 100.
Just like 67.67 would be 67.67% of 100.
:)
Since the problem is quite vague because the number of
choice per question is not written here. I’ll just put for 4 choices and 5
choices each.
To compute for the 5 choices each:
Mean = np = 20 (1/5) = 4
Standard deviation = sqrt(npq) = sqrt (4*(4/5) = 1.79
To compute for the 4 choices each:
Mean = np = 20 (1/4) = 5
Standard deviation = sqrt(npq) = sqrt (5*(4/5) = 2