I need help with 1. 2.and 3. And I need the way you solved it please

Use continuity to evaluate the limit. lim x→16 20 + x 20 + x step 1 consider the intervals for which the numerator and the denominator are continuous. the numerator 20 + x is continuous on the interval the denominator 20 + x is continuous and nonzero on the interval

Find the greatest common factor of 28 and 35

What is (28 + 7 + 6 + 3) x 1/2 show your work