Answer:
68.44%
Step-by-step explanation:
You compute the average the way you compute any average: add up the numbers and divide by their number.
Multiplication is a useful way to shorten the effort of repeated addition.
(64% × 3 + 58% × 7 + 88% × 3 +33% + 100% × 2)/(3 +7 +3 + 1 + 2)
= 1095%/16 = 68.4375%
≈ 68.44% . . . the average mark for the class
Answer:
254.47
Step-by-step explanation:
A= 3.14 x r²
A = 3.14 x 9
A = 254.47
Hope this helps
Good morning ☕️
Answer:
<h2>x² + 7x - 7</h2>
Step-by-step explanation:
f(x)=7x-3 and g(x)=x²-4
(f+g)(x) = f(x) + g(x) = 7x - 3 + x²- 4
= x² + 7x - 7
_________________________
:)
Answer:
74.72
Step-by-step explanation:
Given
mean
Standard deviation 
For Top 25%
and Z value for 75 % is 0.6744
Thus score which separates the Top 25% of students is
A B
D C
vectors
AB = DC
AB (-2-7 ; 3-1) => AB (-9 ; 2)
DC (1-x : -7-y)
1 - x = -9 => x = 10
-7-y = 2 => y = -9
D(10 ; -9)
