Two terms that add to 22 and multiply to give 21 are 21 and 1. Replace 22x with 22x and x.
7x^2 + 21x + x + 3
7x (x + 3) + 1 (x + 3)
(7x + 1) (x + 3)
Answer:
25920
Step-by-step explanation:
Multiply the two numbers
4(10^4)(3.63(10-4))
= 363/25
Answer is 14.52
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:
3.0000
Step-by-step explanation:
