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mella98
17.03.2022 •
Mathematics
‼️WILL GIVE BRAINLIEST
(Please answer all questions!)
ΔABC is translated 4 units to the left and 8 units up. Answer the questions to find the coordinates of A after the translation.
1. Give the rule for translating a point 4 units left and 8 units up. (2 points)
2. After the translation, where is A located? (2 points)
Now reflect the figure over the y-axis. Answer the questions to find the coordinates of A after the reflection.
3. Give the rule for reflecting a point over the y-axis. (2 points)
4. What are the coordinates of A after the reflection? (2 points)
5. Is the final figure congruent to the original figure? How do you know? (2 points)
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Ответ:
1) (x-4 , y+8)
2) (3,13)
3) (x,y) -> (-x,y)
4) (-7,5) This after reflection of original triangle
5) Yes, reflections don't change size, only position
Step-by-step explanation:
Ответ:
1. 0.445 or 0.5
2. 0.167 or 0.2
3. Yes and No
Step-by-step explanation:
2 coins are fair and the 3rd is two-headed
So there are 2 tails and 4 heads altogether.
(A) He randomly picks one, flips it and gets a head. What is the probability that the coin is a fair one?
The probability that the coin is a fair one is: Probability of a fair coin x Probability of obtaining a head
= 2/3 x 4/6 = 0.445 to 3 decimal places
(B) He randomly picks one and flips it twice. Compute the probability that he gets 2 tails
This is = [the sum of the probability that each coin produces a tail 2 times when flipped twice] divided by 3.
For Coin 1, 0.5 is the probability of getting tails. For two consecutive tails, the probability would be 0.5 x 0.5 = 0.25
Same goes for Coin 2 which is the second fair coin.
For Coin 3, the probability of getting a tail at all is 0.
So [0.25 + 0.25 + 0] / 3 = 0.167 to 3 d.p.
(C) Suppose B = the event that the first result is head
Suppose C = the event that the second result is also head
- Are B and C independent (if the two-headed coin wasn't picked)?
YES
- Are B and C independent (if the two-headed coin was picked)?
NO