2 years ago

How do I do this I'm so confused

Mathematics

1 answer:

suter [353]2 years ago

3 0

Answer:

Pretty sure that x would be positive 37.

Step-by-step explanation:

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the morning tempature was -7C. By noon the tempature was 8C. how many degrees has the tampature risen

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3 years ago

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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

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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:

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

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3 years ago

Sequence pattern for 2,1,3,7,13,21

Alina [70]

-1,+2,+4,+6,+8

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3 years ago

Pls<br> Help me <br> I need it

ad-work [718]

Answer:

${2}^{7}$

Step-by-step explanation:

${2}^{7} = 128$

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Therefore 2^7 is greater

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3 years ago

Jennifer is saving money to buy a bike. The bike costs $223. She has $115 saved, and each week she adds $18 to her savings.

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6 weeks

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How do I do this I'm so confused​

How do I do this I'm so confused