we know that
A difference of squares problem can be factored as follows:

in this problem we have

Applying difference of squares

the term

substitute

therefore
<u>the answer is</u>

2.5 hours, because 10 miles an hour times 2 = 20 plus half the time? 2.5
I believe the answer is 9
Answer:
The probability of drawing a second red card, since the first card is red is 25/51
Step-by-step explanation:
The probability of drawing a second red card since the first Card is red is:
P (R2 | R1) = P (R2 and R1) / R1
So:
P (R2 | R1) = (25/102) / 1/2
P (R2 | R1) = 25/51
Therefore the correct option is option 2.
the probability of drawing a second red card, since the first card is red is 25/51
Expected number of wins=number of plays times the probability of winning
w=20(14.5/100)
w=20(0.145)
w=2.9
w≈3
So you would expect to win 3 times out of 20 attempts (rounded to the nearest whole number of wins)