Question

रियास प्रेजेंट एज 1 ईयर्स राइट एंड एक्सप्रेशन फॉर द फॉलोइंग ईयर फादर 18 एज ब्वॉय 5 ईयर​

Answer 1

Answer:

We know that the sum of the opposite angles of a cyclic quadrilateral is 180o. In the cyclic quadrilateral ABCD, angles A and C and the angle B and D form pairs of opposite angles.

∴∠A+∠C=180o and ∠B+∠D=180o

⇒2x−1+2y+15=180 

      and y+5+4x−7=180

⇒2x+2y=166 

      and 4x+y=182

⇒x+y=83 ..(i)

and, 4x+y=182 ..(ii)

Subtracting equation (i) from equation (ii), we get

3x=99⇒x=33

Substituting x=33 in equation (i), we get y=50

Hence, ∠A=(2×33−1)o=65o,∠B=(y+5)o=(50+5)o=55o

∠C=(2y+15)o=(2×50+15)o=115o and ∠D=(4×33−7)o=125o.

Answer 2

Answer:-

Let the number of chairs she purchased be n.

Cost of 1 chair =Rs.250

Cost of 1 teble =Rs.400

Now according to the question-

250×x+400×2=2800

250x+800=2800

⇒250x=2800−800

⇒x=

250

2000

=8

Hence the no. of chairs she purchased is 8.

hope it helps ♡

#MichAditi✨✌️