An obtuse angle is formed by two adjacent angles with measures (x−5)°

and (3x)°
. If the resulting angle measure is 107°
, what is the angle measure of each of the two unknown angles? Round to the nearest whole number.(1 point)
Responses

28°
and 79°
28 degrees and 79 degrees

20°
and 87°
20 degrees and 87 degrees

23°
and 84°
23 degrees and 84 degrees

32°
and 75°

1 answer

To solve for the measures of the two angles, we start by setting up the equation based on the information provided:

The two angles measure \((x - 5)^\circ\) and \((3x)^\circ\), and they are adjacent to each other, forming a resulting angle of \(107^\circ\).

Thus, we can write the equation:

\[ (x - 5) + (3x) = 107 \]

Now, simplify and solve for \(x\):

\[ x - 5 + 3x = 107 \] \[ 4x - 5 = 107 \] \[ 4x = 107 + 5 \] \[ 4x = 112 \] \[ x = \frac{112}{4} \] \[ x = 28 \]

Now, we can find each angle:

  1. The first angle: \[ x - 5 = 28 - 5 = 23^\circ \]

  2. The second angle: \[ 3x = 3 \times 28 = 84^\circ \]

Now, rounding each angle to the nearest whole number:

First angle = \(23^\circ\)
Second angle = \(84^\circ\)

Thus, the measures of the two angles are:

23° and 84°

Therefore, the correct response is:

23° and 84°