A group of 25 students want to see a drake concert. Tickets for members of drakes fan club cost $20 and tickets for no members cost $25. The total cost Is $550
Answers
m=number of members
n=number of nonmembers
n+m=25
cost=550=20m+25n
simplify by dividing by 5
110=4m+5n
so we have
n+m=25 and
5n+4m=110
multiply first eequation by -4 and add to second equation
-4n-4m=-100
5n+4m=110+
n+0m=10
n=10
subsitute
n+m=25
10+m=25
m=15
15 members
10 non-members
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The temperature on Monday was 64.8 degrees and the temperature on Tuesday was 7.6 degrees warmer. The temperature on Tuesday was.....
Help me solve this problem please
Solve 24x + 2y = 48 for y.
Answers
LO/LP = LM/LN
22 / x+12 = 30 / x+12 + 5
22 / x+12 = 30 / x+17
Cross-multiplying:
30x + 360 = 22x + 374
Isolating x to one side of the equation by subtracting 22x and 360 from both sides:
30x + 360 - 360 - 22x = 22x + 374 - 360 - 22x
8x = 14
x = 1.75
Since we now have the value of x, we substitute this to the equation of LP:
LP = x + 12
LP = 1.75 + 12
LP = 13.75
Therefore the value of LP is 13.75 in.
Find the probability that all the cards are face cards.
Note: Face cards are kings, queens, and jacks.
Find the probability that all the cards are even.
(Consider aces to be 1, jacks to be 11, queens to be 12, and kings to be 13)
Answers
Answer:
i dont really understand what you mean it says 3 cards are drawn and it says to find the probability that the cards are all hearts but what is the question asking how do we find the probability
Step-by-step explanation:
Final answer:
The probabilities of drawing all hearts, face cards, or even cards are calculated with the formula: where n is the total number of cards that match the desired outcome.
Explanation:
The subject here is probability, specifically, how to determine the likelihood of a particular outcome when drawing cards from a standard deck. Let's deal with each probability one at a time.
- The probability that all the cards are hearts: There are 13 hearts in a deck of 52 cards. So the probability that the first card is a heart is 13/52, the second is 12/51 (because one heart is already drawn), and the third is 11/50. So, the overall probability is
- The probability that all the cards are face cards: There are 12 face cards (kings, queens, and jacks) in a deck. Using the same principle, the probability is
- The probability that all the cards are even: The 'even' cards are 2, 4, 6, 8, 10, which have 4 of each (hearts, diamonds, spades, clubs) totaling 20 cards. So, the probability is
Learn more about Probability here:
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6.8 × 10-5
6.8 × 10-7
6.8 × 10-6
Answers
236.84
256.50
284.21
Answers
225ft x $0.95=$213.75
Answers
f(x) = - 9 /x
When x = -8, then
f(-8) = 9/8
The negative sign on the right hand side gets cancelled out. From the above deduction, it can be easily concluded that the answer is 9/8. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.
Answers
Quiet Residence-30dB
Soft stereo in Residence-40dB
Average Speech-60dB
Cafeteria-80dB
Pneumatic Jackhammer-90dB
Loud crowd noise-100dB
Accelerating Bike-100dB
Rock concert-120dB
Jet Engine (75 ft away)-140dB
(1)Mode=100dB (since 100 is occurring the maximum no. of times, i.e. it has the highest frequency of 2)
(2)Mean=sum of observations/Total number of observations
=(20+30+40+60+80+90+100+100+120+140)/10
=770/10=10dB
(3)Median= 1/2[{n/2}th observation + {(n/2)+1}th observation], where, n=total no. of observations
So, 1/2[{10/2}th observation + {(10/2)+1}th observation]
=1/2[5th observation+6th observation]
=1/2[80+90] [Because:5th observation=80dB and 6th=90dB]
=1/2(170)
=85
Therefore, median=85dB