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For x=20: difference is 22

Step-by-step explanation:

For f: y increased 5 units (from 1 to 6) when x went from 0 to 10. Being linear, when x=20, f will increase with another 5 units, being 6+5=11.

For g: g(20)=1.5×20+3=33

So, for x=20, f(20)-g(20)=11-33=-22

So the difference is 22.

step-by-step explanation:

this is not possible to solve with the info given.   you need at least an one angle somewhere.