If 54 is the 21st term in an arithmetic sequence with a first term of 4, what is the common difference of the sequence?

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer

Which number line correctly shows 0.8 + 0.3?