What is the sum of the fractions below 2/7+1/5

A.1/4
B.11/35
C.17/35
D.1/6

Is the square root of 4 plus the square root of 16 rational?

I’m really confused and need your assist me with this question i’ve never been taught

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.