X^2-16x+7=0 how do I solve this step by step

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

The number of branches on a tree demonstrates the fibonacci sequence. how many branches would there be on the next two levels of this tree? 13 | | | m branches

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in