Pls ! answers are 90, 80, 75, or 100

One arc is shown as 110 deg.

The arc intersected by the 90-deg angle measure 90 deg.

110 + 90 = 200

360 - 200 = 160

That means the upper arc is 160 deg.

The angle made between a chord and a tangent is half the measure ofthe arc intersected by the chord.

b = 160/2 = 80

b = 80

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

4 + 5 7/9= 9 7/9

step-by-step explanation: