Circles with centers (2,1) and (8,9) have radii 1 and 9, respectively. the equation of a common external tangent to the circles can be written in the form y=mx+b with m < 0. what is b?

Which ratios are equivalent to 10: 16? check all that apply. 30 to 48 25: 35 8: 32 5 to 15

Generate two equivalent fractions for each fraction. use fraction tiles or number lines . 3/4

Each weekday davina rides her bike from her house to school. after school, she rides to the library. then davina takes the same route to get home. these locations are shown on the grid below, where 1 unit on the grid represents 1 kilometer. how many kilometers does she ride each day? 10 16 20 32