How do you subtract positive and negative integers

Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?