We calculate as follows:
15 mL pure ethanol / 100 mL solution (400 mL) = 60 mL pure ethanol
32% = 32 mL pure ethanol/100 mL solution = 60 mL pure ethanol + x mL pure ethanol / (400 + x)
x = 100 mL pure ethanol was added to the solution ------> OPTION D
Answer:
5
Step-by-step explanation:
Step-by-step explanation:
the slope is the ratio "y coordinate difference / x coordinate difference".
so,
(2 - 6) / (x - 2) = 4/7
-4 / (x - 2) = 4/7
-1 / (x - 2) = 1/7
-1 / (x - 2) = 1 / -(x - 2) = 1/7
-(x - 2) = 7
-x + 2 = 7
-x = 5
x = -5
so, the point is (-5, 2)
Answer:
3
Step-by-step explanation: