Hi!
You didn't list the options, but I think I know the answer. Let me know if my answer isn't listed! :)
We need to multiply the exponents.3 · -5 = -15
The answer is 
Hope this helps! :)
Answer:
The price of ribbon is $0.63 per meter.
Step-by-step explanation:
It is given that:
Cost of 3 meter ribbon = $1.89
Unit price per meter = 
Unit price per meter = $0.63 per meter
Therefore,
The price of ribbon is $0.63 per meter.
Answer:
7x+72xy
Step-by-step explanation:
7x+8x(9y)=7x+72xy
Y=6. you would replace x with 7 in the equation.
6(7) = 7y
42=7y
6=y