Answer:
14 one 15 6
Step-by-step explanation:
Answer:
d = -8
Step-by-step explanation:
Isolate the variable, d. Note the equal sign, what you do to one side, you do to the other. Divide -4 from both sides of the equation:

d = -8 is your answer.
~
C is incorrect. 8f represents the cost of 8 formulas, not just the cost of one formula.
Answer:
y=5x-21
Step-by-step explanation: