The rain gauge after a week showed that there were ten inches of rain. Every day the rain evaporated four inches but two more inches of rain was added. By what day was the rain gauge free of water? A. day 2
B. day 5
C. day 7
D. day 10

ok

step-by-step explanation:

i believe that the slope of the line is -5

step-by-step explanation:

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72