Answer:
11
n²
Step-by-step explanation:
Given
= 
× 
× 
= 11 × × n²
= 11n²
9514 1404 393
Answer:
Step-by-step explanation:
If we let 'a' represent the price of an adult ticket, and 's' represent the price of a student ticket, the two sales can be described by ...
5a +4s = 85
5a +2s = 55
Subtracting the second equation from the first gives ...
(5a +4s) -(5a +2s) = (85) -(55)
2s = 30 . . . . simplify
s = 15 . . . . divide by 2
Substituting this into the second equation, we have ...
5a +2(15) = 55
5a = 25 . . . . subtract 30
a = 5 . . . . . divide by 5
Each adult ticket sold for $5; each student ticket sold for $15.
Answer:
<h2>C & D are both, and only correct.</h2>
Step-by-step explanation:
a.)
5x + 10 = 12
x = 2/5 NOT 5/2, so this is in fact INCORRECT.
b.)
3x + 10 = 8
x = - 2/3 NOT 2/3, This too is INCORRECT.
c.)
9x + 15 = 36
x = 7/3. This is CORRECT!
d.)
8x + 12 = 24
x = 3/2. This is CORRECT!
Answer:
0.070
Step-by-step explanation:
Y = number on trial
Y has a negative binomial distribution
r = 3
P = 30% = 0.3 probability of positive indication.
P(Y = 11) probability of 11 employees that must be tested to get 3 positives
Y-1Cr-1*p^r*q^(y-r)
Y-1 = 11-1 = 10
r-1 = 3 -1 = 2
10C2 x 0.3³x0.7⁸
45x0.027x0.05764801
= 0.070
This is the probability that 11 employees must be tested to get 3 positives.
