Answer:
this isnt the answer but it helps solve the equation so here is a little explanation
Step-by-step explanation:
Cost Equation
-Is a mathematical equation for a straight line, to predict total cost.
-Total cost = total variable cost + total fixed cost or Y = vx + f
-Y = total mixed cost
v = variable cost per unit of activity
x = volume of activity
f = fixed cost over a given period of time
Answer:
120
Step-by-step explanation: because you add 20 twice and thts 40 and 40 times 3 is 120
X=width of the lake
y=length of the lake.
we set out this system of equiations
x*y=9/20
x=y/5
we solve by sustitution method
(y/5)*y=9/20
y²/5=9/20
y²=(5*9)/ 20
y²=2.25
y=√2.25=1.5
x=y/5
x=1.5/5=0.3
Solution:
width of the lake=0.3 miles
lenght of the lake=1.5 miles
54:450*100 =
(54*100):450 =
5400:450 = 12
