Answer:
I think your answer 4 I'm not sure tho hope this helps
Answer:
Step-by-step explanation:
8/11 is equal to x/20
Cross multiply
8 times 16 and 11 times x
128=11x
Divide
Then you get 11/128
Divide and simplify!!
Answer:
9
Step-by-step explanation:
we know by definition that

so now we evaluate

and if we want to do an extra step

which works.
The answer to the question is C
Multiply the second equation by -2. This will cancel out the y