Part A: Chose some value for x, that means any amount of books to print for example 100 books, so x=100
Replace x=100 in C(x) and solve:
C(100)=3.5*100+1200=1550
Part B: Replace C(x) by 1900 and solve for x from the given equation:
1900=3.5x+1200
3.5x=1900-1200
x=700/3.5= 200
Part C: the statement C(20)=1270 means that 1270 is the cost for printing 20 books.
Part E: C(40.5)=1341.75 I think this statement is incorrect given the context because x means number of books to print so this value must be an integer number.
There are 4 quarts in a gallon, so do the following:
35 * 2 + 70, 70 / 2 = 35
The answer is B.
Step-by-step explanation:
Arithmetic mean

No because 2/3 to 3/5 and 3/5 to 5/7 arent proportional.
Answer:
x=7y+2
Step-by-step explanation:
switch the letters