20% off means you paid only 80% of the original price.
0.8x=40
x=40÷0.8=50
so the original price is 50
I believe the answer would be 171.5 because the 343m/s is the speed but it only lasted for half a second so divide 343 by 2 and you get 171.5. hope this helps
X + y = -2
-x -x
y= -2 -x
2x -3y = -9
2x -3(-2 -x) = -9
2x +6 +3x = -9
-6 -6
5x = -15
5x/5 = -15/5
x= -3
y= -2 -x
y= -2 -(-3)
y= -2 +3
y= 1
the answer: (-3,1)
Answer:
the probability that he will not win is 2/5 cause it's just the chance that he doesn't win
