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Art [367]
3 years ago
15

If you flipped three pennies, what would be the odds that they all came out the same?

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
7 0
<span>im pretty sure it would be 1 in 3 or 1 in 4</span>
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When mrs. myles gave a test, the scores were normally distributed with a mean of 72 and a standard deviation of 8. this means th
irina [24]
The empirical rule states that in a normal distribution,
68% of data is within 1 std deviation of the mean
95%  of data is within 2 std deviation of the mean
99.7% of data is within 3 std deviation of the mean

In this case 95% of the cases would be within two std deviations of the mean 
    mean - 8         and    mean + 8
     72   - 8 = 64   and    72 + 8 = 80 

then 95% of the scores are between  64% and 80% on the test. 
5 0
3 years ago
How many times does the graph of the function below intersect touch the x-axis? y= -3x^2 + x + 4
inessss [21]

Answer:

2 times

Step-by-step explanation:

Well let's first graph the quadratic equation,

Look at the image below ↓

By looking at the image below we can tell that the graph touches the x axis 2 times at,

<u>(-1,0)</u>

<u>(1 1/3,0)</u>

<em />

<em>Thus,</em>

<em>the parabola touches the x axis twice.</em>

<em />

<em>Hope this helps :)</em>

6 0
3 years ago
Order each set of numbers from least to greatest 3/5,0.8,8%,7/10
agasfer [191]
8%,3/5,7/10 and .8
8% = .08
3/5 = .6
7/10=.7
.8=.8
8 0
3 years ago
Okay so- I picked the yellow one and I don’t know if I’m correct?
Maksim231197 [3]

Answer:

I answered it for u before :D

4 0
3 years ago
a line passes through the points (2, -3) and (b, 7) is parallel to the line y=-2x + 17. Find the value of b.
Anarel [89]

For the lines to be parallel, the slope must be the same

(y2 - y1) / (x2 - x1) = slope

(7- (-3)) / (b-2) = -2

-2 (b-2) = 10

-2b + 4 = 10

-2b = 6

b = -3


7 0
3 years ago
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