Question

Please help, refer to picture

Answer 1

Answer:

  99°

Step-by-step explanation:

∠7 and ∠8 are a linear pair, so are supplementary. Numbers are assumed to be degrees.

  ∠7 + ∠8 = 180

  2x+15 + 3x = 180 . . . . . substitute given values

  5x = 165 . . . . . . . . . . . . subtract 15, collect terms

  x = 33 . . . . . . . . . . . . . . . divide by the coefficient of x

  ∠8 = 3x = 3·33 = 99 . . . . . degrees