For 20points.

a. 25°
b. 30°
c. 35°
d. 40°

  A.25°

Step-by-step explanation:

The angles on either side of the bisector are congruent, so ...

  (3x -5)° = (x +15)°

  2x = 20 . . . . . . . . . . . . divide by °; add 5-x

  x = 10 . . . . . . . . . . . . . .divide by 2

Substitute this result into the expression for the angle measure:

m∠BAC = (3·10 -5)° = 25°

equal to

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation: