Answer:
The answer is A. AB and AC are congruent
Class 2 scored better on average
<h3>How to determine which class scored better on average?</h3>
The averages and the standard deviations are given as:
Class 1
Mean score = 7.8
Standard deviation = 1
Class 2
Mean score = 8.1
Standard deviation = 0.2
As a general rule, the smaller the standard deviation; the better the average
Class 2 has a smaller deviation
Hence, class 2 scored better on average
Read more about standard deviation at:
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A. neither a function nor a relation
Answer:
Step-by-step explanation:
Cost of one dress = 
Cost of one pair of shoes = 
Cost of one dress and a pair of shoes is 
They get half off the price because they buy both
The shipping and handling charge is 
.
So, the total amount Ruth has to pay is 
.
