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andrey2020 [161]
2 years ago
10

Someone help plz and thanks

Mathematics
1 answer:
mylen [45]2 years ago
5 0

Answer:

Step-by-step explanation:

Total students = 6 + 6 +8 + 4 + 2 +3 + 7 + 5 = 41

Probability of a chosen student be Physics or Chemistry or both =

\dfrac{8}{41}+\dfrac{4}{41}+\dfrac{5}{41}=\dfrac{17}{41}

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Find the mean and the median of this data set: 8, 6, 6, 3, 72, 7, 4, 2
icang [17]

Answer:

median: 6  ;  mean: 13.5

Step-by-step explanation:

The median is where you line up the numbers from least to greatest and add the 2 that are left since it was an even number and you get 6. The mean is where you add all 8 numbers and divide by 8, since that is how many numbers there are.

5 0
3 years ago
An investment made in the stock market decreased at a rate of 4.2% per year for 15 years. What is the current value of the $1,00
loris [4]
<span>For exponential decrease use the formula P(1 - r)^t
p: initial amount 
r: rate of change or percent of decrease (be sure to put in decimal form or you wont get the right answer)
t: amount of time (in years) 
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8 0
2 years ago
Solve it............<br>​
DedPeter [7]

Answer:

7

Step-by-step explanation:

1) for '8'; '3'; and '10':

8/2+3+3=10

2) for '2'; '5' and '11':

2/1+5+5=11

3) for '6'; '2' and '?':

6/2+2+2=7

8 0
3 years ago
It costs felisa $0.20 to send a text message from her cell phone. She has already spent 5 in text messages this month if she has
natima [27]

Answer:

60 messages.

Step-by-step explanation:

8 0
2 years ago
The the length of a rectangle is 9 centimeters less than four timesfour times its width. its area is 28 square centimeters. find
wel

Let w = width

then

5w-3 = length

w(5w-3) = 14

5w^2-3w = 14

5w^2-3w-14=0

(5w+7)(w-2) = 0

w = {-7/5, 2}

throw out the negative solution leaving

w = 2 centimeters

length:

5w-3 =5(2)-3 =10-3 = 7 centimeters

4 0
3 years ago
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