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NemiM [27]
3 years ago
15

How do you factorise x^2+2x-15

Mathematics
1 answer:
crimeas [40]3 years ago
7 0
I hope this helps you

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How many leaves on a tree diagram are needed to represent all possible combinations tossing a coin 3 times?
Anika [276]
N = 3 is the number of times the coin is tossed. Since there are 2 outcomes per toss, this means that there are 2^n = 2^3 = 2*2*2 = 8 outcomes total. Therefore, there are 8 leaves total. 

If we make
H = heads
T = tails

Then here are the 8 outcomes in the sample space
HHH
HHT
HTH
THH
HTT
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8 0
3 years ago
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Suppose a normal distribution has a mean of 48 and a standard deviation of 2. What is the probability that a data value is betwe
stepan [7]

Answer:

Choice D.  15.2%

Step-by-step explanation:

We have a normal...

mean u = 48

standard deviation s = 2

We want P(43 < X < 46)

We standardize.

Consider  P(43 < X)  = P( (43 - 48)/2 < Z) = P(-2.5 < Z)

P( X < 46) = P( Z < (46 - 48)/2 ) = P(Z < -1)

We want  P( -2.5 < Z < -1)

Look at Z-scores.

P( Z < -2.5)  = 0.0062

P(Z  < -1) = 0.1587

so  P(-2.5 < Z < -1) =  P(Z < -1) - P(Z < -2.5) = 0.1587 - 0.0062 = 0.1525 = 15.2%

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Vanessa bought 6 feet of ribbon. She cut off 33 inches to wrap a package and 11 inches to decorate her scrapbook. How many inche
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28 inches of the ribbon are left
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3 years ago
Please help I will mark you as brainlist it’s emergency
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Answer:

d

Step-by-step explanation:

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The slope of this line is 2.

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