Point O is on line segment NP . Given NP=18 and , NO=10, determine the length OP .

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

∠cbe and ∠deb are same-side interior angles.

i took the test

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.