(B)
if <em>f</em>(a) = K, then that means <em>f </em>sends (a) to (K).
the inverse function, <em>f</em>-1, goes back where you started, so <em>f</em>-1 <em />sends (K) to (a).
<em>f</em>-1(K) = a.
Answer:
2 times
Step-by-step explanation:
1/3=.33 and 3/4=.75,so .33*2 is .66,which is still smaller than .75
Mark me brainliest if this helped :D
Answer:
a) 135 minutes
b) 15
c) 0.5
d) 0.3707
Step-by-step explanation:
A) What is the distribution's mean
mean(m) = (120 + 150)/2 = 270/2 = 135 minutes
B) What is the distribution's standard deviation
standard deviation(s) 
s = 15
C) What is the probability that a flight is less than 135 minutes
firstly calculate z score
z score = (x - m)/s = (135 - 135)/15 = 0
P(x<135) = z(0) = 0.5
D) What is the probability that a flight is more than 140 minutes?
z score = (x - m)/s = (140 - 135)/15 = 0.33
P(x>140) = 1 - P(x<140) = 1 - 0.6293 = 0.3707
Answer:
Adult tickets = 84
Children tickets = 33
Step-by-step explanation:
At a play 117 tickets were sold.
Adult's tickets (a) cost $2.50 each and,
Children's (c) tickets cost $1.00 each
Money collected = $243
This is the simultaneous equation formed:
a + c = 117 ... (i)
2.5a + c = 243 ... (ii)
Subtracting (ii) - (i) we get;
1.5a = 126
a = 126 ÷ 1.5 = 84
So there were 84 adult's tickets sold and 117 - 84 = 33 children's tickets sold.
