Answer:
6,5
Step-by-step explanation:
-3x(x-1)+7x=27
-3x²+1+7=27
-4x+1=27
4x=1-27
x=26/4
x=6,5
-3x^2 +3x + 7x = 27
-3x^2 +10x - 27 = 0
$14
80% of $70 is $14, saving him $56
2/3 hours
40 minutes = 40/60 = 2/3 hours
i cannt see it
