Answer:10 liter * 20%= x liter*40% + (10- x) liter*5%
10l * 20%= x liter * 35% + 10 liter*5%
x liter *35 = 10l * 20 - 10l *5= 10l*15
x liter = 10l *15/35= 4.28 L= 4.3L
The volume of 40% solution= 4.3L
The volume of 5% solution= 10L- 4.3L= 5.7L
Step-by-step explanation:
In this question, you want to make 10 liters 20% concentration solution by mixing 5% and 40% concentration. There should be multiple answers to this question. Assuming that the total volume of 5% and 40% solution equal to 10L(no solution wasted), then you can determine the volume of solution needed. The formula should be:
It might be 5 multiplied by x but I'm not sure.
Point slope means
y-y1=m(x-x1)
where the slope is m and a point on the graph is (x1,y1)
we are given
slope=-3
therefor
y-y1=-3(x-x1)
eliminate choices A and D
they gave us point (5,-7)
x1=5
y1=-7
y-(-7)=-3(x-5)
y+7=-3(x-5)
C is answer
First question: -14
Second question: 4/5
4.92/12 is equal to .41 meaning that it's below $1 and the unit price is $.41
