If C is a point between AB then we can write AC + CB = AB
Same way we can write tu + ub = tb
tu = 4x - 1 , ub = 2x - 1 and tb = 5x
So we can write it as
So x is = 2.
1 gallon is 16 cups
we have 11/4 cups which multiplied by 16 gives us 44 cups
I think if I do this correctly, the answer is x<-1
C + 3d = 4.10.....multiply by -2
2c + 2d = 4.60
----------------
-2c - 6d = - 8.20 (result of multiplying by -2)
2c + 2d = 4.60
-----------------add
-4d = - 3.60
d = -3.60 / -4
d = 0.90 <==== cost of 1 doughnut
c + 3d = 4.10
c + 3(0.90) = 4.10
c + 2.70 = 4.10
c = 4.10 - 2.70
c = 1.40 <==== cost of 1 coffee
The equation you would need to solve is <span><span>x^2</span>+(x+1<span>)^2</span>=421. I'm not at a college level though so i don't know how to.
Give me feedback if this helped!</span>
