<span>-6f+13=2f-11
-6f - 2f = -11 - 13
-8f = -24
f = 3</span>
Answer:
Total cost of Mark's board is $3.75.
Step-by-step explanation:
We are given the following in the question:
Length of wooden board =

Unit cost of board = $0.50 per foot
Total cost of board =

Thus, total cost of Mark's board is $3.75.
Answer:
-20/3
The exact form is -20/3
The decimal form is -6.6 repeating
The mixed number form is -6 2/3
Hope this helps!
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Answer:
-7
Step-by-step explanation:
5-x=12 subtract 5 from both sides to get x alone
-x=7 divide both sides by -1 so that x is positive
x=-7