You multiply 86 by 42.5 because each board is 42.5 and there are 86 boards.
Answer:
D
Step-by-step explanation:
Hope this helps :)
Answer:
.
Step-by-step explanation:
The given equation is

Using distributive property, we get



Isolate variable terms.


Divide both sides by -0.35.



Therefore,
.
Yes the equation is linear because the linear equation is y=mx+b and y=85x-600 is linear.