The cost for a business to make greeting cards can be divided into one-time cost (e.g., a printing machine) and repeated costs (e.g., ink and paper). Suppose the total cost to make 30 cards is $800, and the total cost to make 550 cards is $1,300. What is the total cost to make 1,000 cards?

I don't even know how to find the answer. Someone please help me.

5 answers

Amanda is r years old.Her father is 10 times as old as Amanda.What will their total age be in 3 years time?
If the fixed cost is x, and the repeated cost is y per card, then

x+30y=800
x+550y=1300

clearly 520y = 500
Now you know y, and you can find x, and then x+1000y

I suspect a typo, and you must have meant 300 cards or 330 cards or something. Still, follow the steps.

as for Amanda and her father,

Amanda is r
father is 10r

in 3 years, their ages will be
r+3 and 10r+3

so add them up
Does any body have the full answers to the test im way behind need to finish this
Please
Answers
I’m working on it half to do the test myself