Question

Answer pls!! quick asp

Answer 1

ZR = 145°

Explanation:

the secant- secant angle ZAR is half the difference of the measures of the intercepted arcs , that is

∠ ZAR =
`(1)/(2)` ( ZR - KV )

30 =
`(1)/(2)` (5x + 10 - (3x + 4) ) ← multiply both sides by 2 to clear the fraction

60 = 5x + 10 - 3x - 4

60 = 2x + 6 ( subtract 6 from both sides )

54 = 2x ( divide both sides by 2 )

27 = x

Then

ZR = 5x + 10 = 5(27) + 10 = 135 + 10 = 145°