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Elenna [48]
3 years ago
10

The graph below shows four straight lines, W, X, Y, and Z.

Mathematics
2 answers:
rosijanka [135]3 years ago
6 0
The answer is X- the gradient is +5, and the line goes through +5 on the graph
Digiron [165]3 years ago
3 0
The y intercept (when x = 0) is at y=5 as y=3(0) + 5 allows y to equal 5. Therefore the answer is line x as it also goes through 5 when x = 0
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Suppose you have an experiment where you flip a coin three times. You then count the number of heads. a.)State the random variab
WITCHER [35]

Answer:

a) X=number of heads observed when flipped the coin 3 times

b) the probability distribution is

P(X=x) = 3/4 * (1/[(3-x)!*x!)])

or

P(X)=1/8 for x=0 and x=3 and P(X)=3/8 for x=1 and x=2

Step-by-step explanation:

the random variable will be X=number of heads observed when flipped the coin 3 times . Since the result from each flip is independent of the others , then X has a binomial probability distribution , such that

P(X=x)= n!/[(n-x)!*x!)*p^x * (1-p)^(n-x)

where

n= number of times the coin is flipped = 3

p= probability of getting heads in a flip of the coin = 1/2 (assuming that the coin is fair)

therefore

P(X=x)= 3!/[(3-x)!*x!)*(1/2)^(3-x) * (1/2)^x = 3!/[(3-x)!*x!) * (1/2)³ = 3/4 * (1/[(3-x)!*x!)])

P(X=x)= 3/4 * (1/[(3-x)!*x!)])   , for x=[0,1,2,3]

for x=0 and x=3 → P(X)=3/4 * (1/[3!*0!)]) = 1/8

for x=1 and x=2 → P(X)=3/4 * (1/[2!*1!)]) = 3/8

we can verify that is correct since the sum of all the probabilities from x=0 to x=3 is  1/8 +  3/8+ 3/8+ 1/8 = 1

8 0
3 years ago
Read 2 more answers
What is the midpoint between 2 and 10?
I am Lyosha [343]
The answer to this question would be 6
7 0
3 years ago
-2.8 repeating as a fraction
Marizza181 [45]
0.8888888 = 8/9
2.8888888 = 26/9
-2.888888 = -26/9
3 0
3 years ago
1.The radii of two circles are in the ratio of 3 to 1. Find the area of the smaller circle if the area of the larger circle is 2
zmey [24]

It’s 9. 3x9 is 27. Nothing else times anything equals 27, excluding decimals.

8 0
3 years ago
Read 2 more answers
Does anyone know??????
masha68 [24]

Answer:

y=23x+4

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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