The average score of all the students in both classes is 84.
<h3>How to calculate the average?</h3>
The class with 30 students had an average score of 80 on a test. The total score will be:
= 30 × 80
= 2400
A class with 20 students had an average score of 90 on the same test. The total score will be:
= 20 × 90
= 1800
Total scores = 2400 + 1800 = 4200
Number of students = 20 + 30 = 50
The average score will be:
= Total score / Total students
= 4200 / 50
= 84
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Answer:
x=8.8571428
Step-by-step explanation:
7x-7=55
Add 7 to both sides,
7x=62
divide by 7
x=8.8571428
Can I get the brainliest?
The answer is D , start from 2 and count to 8 and it gives you your answer
Verizon
Flat fee of 30 plus 10 equals 40
AT&T
Flat fee of 50 plus 5 equals 55
For them to equal the same
Verizon you need 3 lines which is 30 plus the flat fee of 30 so 60 dollars together
For AT&T
You would need 2 lines of 5 which is 10 plus 50 equals 60
Verizon 3 lines
AT&T 2 lines
Answer:
Step-by-step explanation:
75/4 = 18.75mm