Y - (-7) = -1¹/₂(x - 8)
y + 7 = -1¹/₂(x) + 1¹/₂(8)
y + 7 = -1¹/₂x + 12
- 7 - 7
y = -1¹/₂x + 5
The formula for the area of a triangle is 1/2*base*height so setting a=18 you can set up the equation as 18=1/2*b*h which gives 18=1/2*(c-1)*6c. simplifying gives 18=3c(c-1). setting the equation to 0 gives a quadratic which is
3c^2-3c-18=0 which gives c= 3 or -2 since -2 doesnt make sense we can assume c=3 so filling the equation with c=3 gives 18=1/2*(6*3)*(3-1) which gives 18=1/2(18)(2) you see 1/2*2 cancels and you are left with 18=18 which is correct so c=3 and height =18
The minimum number of gallons Shell will need is 15.
If white, is w, then you have the equation w+2w+w+50=530.
4w=480, so there are 120 white colored shirts.
There are 240 red colored shirts.
There are 170 blue colored shirts.
