The answer is C) 2x^4+9x^2-6x-1
3x+5y=42
9x+7y=78
adding above equation
12x+12y=120
x+y=10
0.2
had to make this longer so yea
3 oranges / 4 friends = 3/4 orange for each of them, or 0.75 orange each
(You can check the answer by saying, if each of them get 3/4 of an orange, then multiplying that by the 4 friends should give me the 3 oranges. 3/4 x 4 = 3, so it's correct).
