Answer:
The require expected value of x is 
Step-by-step explanation:
Consider the provided information.
Mike will play a game in which he will toss a penny, a nickel, and a dime at the same time.
The probability of head is 
He will be awarded 3 points for each coin that lands with heads faceup.
Let the random variable x represent the total number of points awarded on any toss of the coins.
Thus the expected value is:
Hence, the require expected value of x is
Answer:
40%
Step-by-step explanation:
Original price = x
Sale = 20% off
20% / 100 = 0.2 to convert from a percent to a decimal
Sale = x - 20% of x = x - 0.2x = 0.8x
Sale price = y = 0.8x
Reduction of sale prices = 25% = 0.25
Reduction = y - 25% of y = y - 0.25y = 0.75y
End price in terms of original price (x):
0.75y = 0.75(0.8)x
= 0.6x
End price = 0.6 or 60% of original price, coming out to a 100-60 = 40% overall percentage reduction
Answer:
f
( 
+
5
)
=
3
+
13
Step-by-step explanation:
Random
I think this because Mr. Jackson doesn't know these students on a personal level so he would just pick Randomly
Answer:
30mph faster
Step-by-step explanation:
first you must find how fast the train can go in 1 hour
that is 60mph, then multiply 60 and 2.5
60x2.5 = 150mph then,
150 - 120 =30mph
very sorry if this is wrong
