Answer:

Step-by-step explanation:
If a watch has fewer than three defects, then either 1.) It has no defects, 2.) it has exactly 1 defect, or 3.) it has exactly 2 defects.
1.) The probability that the watch has no defects is
, because for every chime there is a probability of
that there is no defect
2.) The probability that the watch has exactly 1 defect is
times the number of ways you can choose 1 of 75 of the chimes to be defective, which is
, so the probability that the watch has exactly 1 defect is
.
3.) For the same reason as 2.), the probability that the watch has exactly two defects is 
Since 1.), 2.), and 3.) are mutually exclusive events, the probability of their union is simply the probability of each of them added together, which is 
Answer:
40
Step-by-step explanation:
50% is equal to 1/2 so if we multiply 40 by 2 you get 80 then subtract what she already did and you get 40.
hope this helped
Answer:
ax^2 + bx + c
Step-by-step explanation:
im pretty sure this answers your question
In figure 1 there are 7 squares, in figure 2 there are 10 squares, figure 3 there are 13 squares. in each figure you are just adding 3. (try to find the patterns.) The equation representing the figures is x+3=y.
Answer:
Option d. 
Step-by-step explanation:
we know that
If a ordered pair is a solution of an inequality, then the ordered pair must be satisfy the inequality
Verify each case
case a) 
we have

Substitute the value of x and the value of y in the inequality and then compare the results

-----> is not true
therefore
the ordered pair is not a solution
case b) 
we have

Substitute the value of x and the value of y in the inequality and then compare the results

-----> is not true
therefore
the ordered pair is not a solution
case c) 
we have

Substitute the value of x and the value of y in the inequality and then compare the results

-----> is not true
therefore
the ordered pair is not a solution
case d) 
we have

Substitute the value of x and the value of y in the inequality and then compare the results

-----> is true
therefore
the ordered pair is a solution