Answer:
i think B=20 But i might be wrong
Step-by-step explanation:
Using the binomial distribution, it is found that the probabilities are:
<h3>What is the binomial distribution formula?</h3>
The formula is:
The parameters are:
- x is the number of successes.
- n is the number of trials.
- p is the probability of a success on a single trial.
Exercise 1:
The parameters are:
n = 15, p = 0.4, x = 4.
Then:
Exercise 2:
The parameters are:
n = 12, p = 0.2, x = 2.
Then:
Exercise 3:
The parameters are:
n = 20, p = 0.05.
The probability is:
Using the binomial formula for each value and adding them:
More can be learned about the binomial distribution at brainly.com/question/24863377
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Answer:
y = x + 3 is red line.
y = -3x-2 is green line.
y = -x-7 is black line.
y = 2x + 1 is blue line.
Step-by-step explanation:
first we look at up on both and y intercepts
then find a line.
y = x + 3
x intercept is : x + 3 = 0 so x = -3
y intercept is : 0 + 3 = 0 so y = 3
y = -3x-2
x intercept is : -3x-2 = 0 so x = -2/3
y intercept is : -3*0 -2 = 0 so y = -2
y = -x-7
x intercept is : -x -7 = 0 so x = -7
y intercept is : 0 -7 = 0 so y = -7
y = 2x+ 1
x intercept is : 2x+1 = 0 so x = -1/2
y intercept is : 0*2 + 1 = 0 so y = 1
therefor :
Answer:
y = x + 3 is red line.
y = -3x-2 is green line.
y = -x-7 is black line.
y = 2x + 1 is blue line.
Answer: Each ticket costs $32
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Explanation:
Let x be the cost of one ticket. If four people buy a ticket each, then they collectively spend a total of 4x dollars for those tickets. Add on 4*3 = 12 dollars from the fact that they bought the ice cream, and we arrive at the expression 4x+12. This is the total amount spent in dollars for the tickets and ice cream combined.
Set this expression equal to 140 and solve for x
4x+12 = 140
4x = 140-12
4x = 128
x = 128/4
x = 32
This says that each ticket costs $32
If one ticket costs $32, then four of them cost a total of 4*32 = 128 dollars. Add on the $12 spent on the ice cream to get 128+12 = 140, which helps verify we have the correct ticket price.
Another way to verify is to replace x with 32 in the original equation we set up, then simplify like so
4x+12 = 140
4*32+12 = 140
128+12 = 140
140 = 140
This is very similar to the previous verification technique used earlier.