The 5 is the number of years that the interest rate is fixed (at the initial amount set when you sign the mortgage contract)
The 1 represents the idea that the interest rate will change every year after the initial 5 years are up.
Answer:
20 x 1 / 18= 1.11
Step-by-step explanation:
It looks like your first selection (a) is appropriate.
1.) X=-2
2.) 2x-y+4=0
Hope this helps! :))