Answer:
1.T 2.T 3.T
Step-by-step explanation:
hope this helps
Answer: 
Step-by-step explanation:
Given: An urn contains 3 red and 5 orange marbles.
Total marbles = 3+5=8
Probability of getting orange marble = 

Now marbles left = 7
Orange marbles left = 4
and Probability of getting orange marble = 
The probability that the second marble selected is orange given that the first marble selected is orange
Required probability= 
Answer:
A. (-7 -2)
Step-by-step explanation:
You can eliminate y by multiplying the first equation by 7 and subtracting 6 times the second equation:
7(-3x +6y) -6(5x +7y) = 7(9) -6(-49)
-21x +42y -30x -42y = 63 +294 . . . . eliminate parentheses
-51x = 357 . . . . . . . . collect terms
x = -7 . . . . . . . divide by -51. This matches answer choice A.