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mestny [16]
3 years ago
5

Alina has just recieved 3 video games for her birthday to add to her existing 12 video games. A week later she went to the thrif

t store and doubled her video games. Another week she bought 5 more games what's the numerical expression for the total amount of video games alina has now
Mathematics
1 answer:
Papessa [141]3 years ago
3 0
Let the existing no. of video games she had be x,
then 
(3+x)+2x+5

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Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper c
svp [43]

Answer:

0.2839 = 28.93%

Step-by-step explanation:

In order to find find the probability that one car chosen at random will have less than 68.5 tons of coal, we have to find z

Le x be tons of coal in a car

Z = (x – mean)/standard deviation

Z = (x – μ)/ σ

P (x<68.5) = P(z < (68.5-69)/0.9)

P (x<68.5) = P(z < -0.5555)

Then we use the z table to find the area under the curve.

P (x<68.5) = 0.2893

5 0
3 years ago
HELPPP ASAPP Bernie's Bars has determined that a granola bar measuring 3 inches long has a z-score of +1 and a granola bar measu
Len [333]

Answer:

Standard deviation of the length of granola bars produced at Bernie's Bars is 0.50      

Step-by-step explanation:

We are given the following information in the question:

Formula:

z_{score} = \displaystyle\frac{x - \mu}{\sigma}

where,

μ is the mean and σ is the standard deviation.

Putting the values we get:

\displaystyle\frac{ 3- \mu}{\sigma} = 1\\\\3 = \sigma + \mu\\\\\displaystyle\frac{ 3.5- \mu}{\sigma} = 2\\\\3.5 = 2\sigma + \mu

Solving the two obtained equations:

Subtracting the two obtained equation, we have:

3.5-3 = \mu + 2\sigma - \mu -\sigma\\\sigma = 0.5

Hence,  standard deviation of the length of granola bars produced at Bernie's Bars is 0.50

3 0
3 years ago
Read 2 more answers
Please help me solve these!!!
Marat540 [252]

Answer:

Maybe add or Multply every surface then add the surfaces then get your answer

Step-by-step explanation:

Maybe pay attention next time.

8 0
3 years ago
Will give me a 20% discount if I spend over $50 my bill is $75.What is my final bill after the savings
Andrews [41]
Hey there,
$75 is above $50
Final Bill = $75 - (20% x $75)
              = $75 - $15
              = $ 60

Hope this helps :))

<em>~Top♥</em>
7 0
3 years ago
Read 2 more answers
After 15% discount an item cost $22.27 what was the original price?
musickatia [10]
Orig - .15 * orig = 22.27
.85 * orig = 22.27
Original price = 26.20

6 0
3 years ago
Read 2 more answers
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