You need 9 grams of sodium chloride per 1 liter of water
or
1 teaspoon of sodium chloride per cup of water (1 cup = 8 Fluid ounces)
Answer:
4 weeks
Step-by-step explanation:
75-5*x=55
x=4 weeks
As the midpoint is a point on the perpendicular line, we can solve by eliminating the other equations, like this:
Check if the point (-1,-2) is on the line y=-4x-4:
-4(-1)-4=0 is differente from -2.
-4(-1)-6=-2, so (-1,-2) is on the line y=-4x-6.
We check also for the other equation like this:
Third equation: (-1)-4 = -5 not equal to -2.
Fourth equation: (-1)-6=-7 not equal to -2.
So the correct answer is the line y=-4x-6