Answer:
The value of x and y is 5 and 22 respectively
Option C is correct.
Step-by-step explanation:
Given the figure
BC=2x+7, AB=4x-3, AD=CD, ∠ABC=79° and ∠BCD=(5y)°
we have to find the values of x and y.
As in given figure AD=CD
which implies the figure ABCD is kite.
Two disjoint pairs of consecutive sides of kite are congruent, AB=BC
∴ [tex]2x+7=4x-3[/tex]
[tex]4x-2x=7+3=10[/tex]
[tex]2x=10[/tex]
[tex]x=5[/tex]
As the non-vertex angles of a kite are congruent.
⇒ ∠BAD=∠BCD=(5y)°
Now as ABCD is a quadrilateral therefore by angle sum property of quadrilateral, the sum of all angles of quadrilateral equals to 360°
∠A+∠B+∠C+∠D=360°
5y+79°+5y+61°=360°
10y=220°
y=22
Hence, the value of x and y is 5 and 22 respectively.
Option C is correct.