If two terms of an arithmetic sequence are a11 = 23 and a15 = −5, what is a28?

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

3; 9 is 8 to -4

step-by-step explanation:

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

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step-by-step explanation: