<span>The equation has one solution: x = 3.</span>
Answer:
75,62.5
Step-by-step explanation:
Given that Mr. Dennis gave his class a 20-question multiple choice quiz. The distribution of raw scores had a mean of 15 and a standard deviation of 2.5
If X is the correct questions in the 20 mcq then
X is with mean = 15 and std dev = 2.5
when score is multiplied by 5
random variable now is
Y = 5x
E(Y) = Mean of Y = 

Thus new score out of 100 would have mean = 75 and std deviation = 62.5
to solve this you will first subtract 8 from 84
you will get 76
now all you do is divide 76 by 4 and you will get 19
if you dont know what divideing is you can just subtract 4 from 76 until there is only 0 left
the answer is 19 if you forgot
Answer:
3x + 3 = (2x - 4)/5
3x + 3 = 10x - 20
13x - 17
Step-by-step explanation: