well 3x15= 45 and 15x17= 255 so 45+255= 300
Answer:
Step-by-step explanation:
If the mean of 15 students is 71.5, then total score = 15 X 71.5 = 1072.5
The median score is 62, meaning that, the combined score of two students = 62 X 2 = 124
The difference of 1072.5 and 124 = 948.5, this represents the total score of 13 other students
∴ The mean score of 13 students = 948.5/13 = 73
In conclusion, it was only very few students that took the exam and majority of other students absconded from the exam. Majority of students scored averagely above 70.
Answer:
-8, 7
Step-by-step explanation:
Set up an equation.
<em>x² + x = 56</em>
Set the equation equal to zero and factor.
<em>x² + x - 56 = 0</em>
<em>(x + 8)(x - 7) = 0</em>
Solve for x.
<em>x + 8 = 0</em>
<em>x = -8</em>
<em>x - 7 = 0</em>
<em>x = 7</em>
The possible x values are -8 and 7.
The value of 4 in 1.848 meter is 4 hundredths or 0.04. The fraction form for 4 hundredths is 4 over 100 or 1 over 25
(10 cm) / (2 yrs) = (10 / 2) (cm / yr) = 5 cm/yr