How do you subtract an integer from another integer without using a number line

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x

Find the quotient with the restriction.