Answer:

Step-by-step explanation:
Let's solve for L.

Step 1: Flip the equation.

Step 2: Add
to both sides.


Step 3: Divide both sides by
.


Answer:

First piece is x
second piece is y. y=4x
third piece is z. z=3y=12x
x+y+z=680
x+4x+12x=680
17x=680. x=40cm y=160cm. z=480cm
Answer:
Option 4 is correct.
Step-by-step explanation:
r are increasing and s are increasing, therefore the second graph or third graph. For r = 0 → s = 10.
Therefore your answer is second graph.