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-BARSIC- [3]
3 years ago
11

2) Find the value of two numbers if their sum is (14 and their difference is 2.

Mathematics
1 answer:
Alchen [17]3 years ago
7 0

Answer:

8 and 6

Step-by-step explanation:

Because 8 plus 6 equals 14 and the difference between the two numbers is 2

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A vending machine operator has determined that the number of candy bars sold per week by a certain machine is a random variable
docker41 [41]

Answer:

The answer is below

Step-by-step explanation:

Let Y represent the profit per day, and x represent the number of bar sold per day. Hence:

Y = 0.25x - 2

a) The mean is given as:

\mu_y=E(Y)=E(0.25X-2) = 0.25E(X)-2\\\\But\ E(X)=mean\ of\ machine=125. Hence:\\\\E(Y)=0.25(125)-2=29.25\\\\E(Y)=\$29.25

b) The standard deviation of y is:

\sigma_y=var(0.25X-2)\\\\\sigma_y=0.25\sigma(X)\\\\but\ \sigma_X=7,hence:\\\\\sigma_y=0.25(7)=1.75\\\\\sigma_y=\$1.75

6 0
3 years ago
FOR BRAINLIST ANSWER AND 10 POINTS ANSWER ALL PLZ !!!!!
igor_vitrenko [27]
<h2>Greetings!</h2>

A)

<h3>If you can see, every 4 minutes the amount of water is increasing at a constant rate. </h3>

197 - 153 = 44

285 - 241 = 44

<h3>This means that at 8 minutes, because there is 153 gallons already in, we can divide 8 by 4 to see how many groups of 4 minutes there were. </h3>

8 ÷ 4 = 2

So then we can subtract two lots of 44 from 153:

153 - (44 x 2) = 65

<h3>So the starting amount was 65.</h3>

B)

<h3>The answer to B is the second option, because it is true that the amount of water is increasing. This is by 44 gallons per 4 minutes.</h3>

The amount of gallons per minute can be found out by dividing the amount by 4:

44 ÷ 4 = 11

<h3>So it is 11 gallons per minute.</h3>
<h2>Hope this helps!</h2>
3 0
3 years ago
Find two different 2 by 2 matrices a and b such that ab=ba
stiv31 [10]
Let \mathbf A=\mathbf I be the identity matrix. Then pick whatever matrix you like for \mathbf B.
8 0
3 years ago
(50 points) What is the value of sin J for this triangle?
weqwewe [10]

Answer:

8/17

Step-by-step explanation:

right angle box means that area is the bottom

soh cah toa

hypotenuse is 17

hypotenuse is usually the biggest number

opposite is 8

sin is opposite/ hypotenuse

sin is 8/17

6 0
3 years ago
Given F = gm^1m^2/d, solve <br> I don’t know the answer.
tatiyna

Answer:

F = (G * m2)  

Step-by-step explanation:

1: The first main step is to divide so g*m1sqm = F/d

Then just divide in m1m2 from both sides then you will get the answer

Hope that helps.

8 0
3 years ago
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