Is it possible to have an expression that uses brackets without using parentheses? Explain.
2 answers:
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Answer:
D
Step-by-step explanation:
gradient is change in y/change in x
gradient of UV = 14-8/12+4=3/4
use equation y=mx+c where y is the y coordinate, m is the gradient, x is the x coordinate and c is the y intercept
use one of the coordinates of U or V, I'll use (4,8)
c is 5
the equation for UV is
insert each X coordinate given in the question to see if it gives the same y coordinate
when x is 20, y is also 20 so the answer is D
Answer:
a. P(X=8)=0.0277
b. P(X<4)=0.3460
c. No. P(X<8)=0.9605
Step-by-step explanation:
a. Let x denote the event.
This is a binomial probability distribution problem expressed as
Where
- n is the total number of events
- p is the probability of a success
- x is the number of successful events.
Given that n=16, p=0.267, the probability of exactly 8 people not covering their mouths is calculated as:
Hence, the probability of exactly 8 people not covering their mouths is 0.0277
b. The probability of fewer than 4 people covering their mouths is calculated as:
-We calculate and sum the probabilities of exactly 0 to exactly 3:
Hence, the probability of x<4 is 0.3460
c. Would you be surprised if fewer than half covered their mouths:
The probability of fewer than half covering their mouths is calculated as:
No. The probability of fewer than half is 0.9605 or 96.05%. This a particularly high probability that erases any chance of doubt or surprise.