Increase=higher-lower=386-313=73
percent increase=increase/original times 100=73/313 times 100=0.23322683706070287539936102236422 times 100=23.322683706070287539936102236422
so it is about 23% increase
the increase is 73
Answer:
3 student.
Step-by-step explanation:
From the first statement:
Let the total score be T
Let the total number of student be x
The average of the score = 72
Average = Tota score / number of student
72 = T/x
Cross multiply
T = 72x ..... (1)
Second statement:
One more student took the test and the average becomes 76 with the student having a score of 88.
Therefore,
Overall score = T + 88
Total student = x + 1
Average = 76
Average = overall score / total number of student
76 = (T + 88) /(x + 1)
Cross multiply
76(x + 1) = T + 88
Clear bracket
76x + 76 = T + 88
From equation 1
T = 72x
76x + 76 = 72x + 88
Collect like terms
76x – 72x = 88 – 76
4x = 12
Divide both side by the coefficient of x i.e 4
x = 12/4
x = 3
Therefore, the initial number of the student were 3.
Answer:
long = 8.66
Step-by-step explanation:
pythagorean theorem
short squared + long squared = hypotenuse squared
25 + long squared = 100
long squared = 75
square root of long squared = square root of 75
long = square root of 75
long = 8.66025403784
Answer:
(2n - 7) - 10
Step-by-step explanation:
(2n - 7) represents "difference of 2 times a number and 7"
- 10 represents "10 less"
