The probability would be 1 in 8, or 12.5%
The answer is 3x+5y=5y+3x hope this helps.
Since the number 3 is in the tenth place and the number to the right of it is 5 or greater, you would round the 3 to 4. Your final answer would be 11.4
Let x = number of questions worth 2 and y be those worth 5.
so we have the system:-
x + y = 50
2x + 5y = 145
multiply first equation by -2:-
-2x - 2y = -100
Add this to the second equation:-
3y = 145-100
3y = 45
y = 15
and x = 50-15 = 35
Answer:- there are 35 questions worth 2 points and 15 worth 5 points.
recall that minus * minus = positive, so (-3)² is really (-3)(-3), which gives us a positive 3*3 or 9.