If 15 is 1/4 of an hour then multiply 12 with 4. It’s 48, they can hang 48 sheets in an hour.
Answer:
Step-by-step explanation:
for inverse of f(x)=2x+2
x=2y+2
x-2=2y
(x-2)/2=y
therefore the inverse f(x)=(x-2)/2
Answer:
or 
Step-by-step explanation:
To solve the quadratic equation we must factor the expression
Look for 2 numbers that when you multiply them, obtain the result -100 and when you add them, obtain the result -15.
You can verify that these numbers are -20 and 5

Then the polynomial factors are

The zero product property says that if two terms
then
or 
So
or 
or 
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