Me for find each measurement indicated. round your answers to the nearest tenth.

AB=18km

Step-by-step explanation:

In any triangle in 2 dimensions our interior angles should equal to 180°.

We know 2 of the three interior angles, since we know it must sum up to 180° let's subtract these known interior angles to obtain:

180°-79°-68°=33°

Furthermore, since this triangle is not a right triangle we cannot use the Pythagorean equation.  Therefore let's use the law of sines:

Where A is angle A=33°, B = 68°, C=79°, a = CB, b=AC, c=AB.

Since we want to find side AB and we know A, a, and C we only use 2 of those parts of the law of sines and so:

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer