127/14
Step-by-step explanation:
The LCD here is (7)(2) = 14.
Thus we have 78/14 + 49/14 = 127/14
4sqrt5
step-by-step explanation:
the base has dimensions of 8 x 4, so the diagonal is 64 + 16 square rooted or 4sqrt5.
answer: (1,3) and (-2,0) i think.