B) The price of an electric fan is fixed 20% above its cost price. When it is sold allowing 18% discount, there is a loss of Rs 20. Calculate the marked price and the selling price
of the fan.

Step-by-step explanation:

Let Cost price ( C.P ) be x

Finding the Marked price and selling price

Marked price =

⇒

⇒

⇒ ⇒ ( i )

Selling price =

⇒

⇒

⇒

⇒

⇒ ⇒ ( ii )

Finding the value of x ( Cost price )

⇒

⇒

⇒

⇒

⇒

⇒

Value of x ( cost price ) = Rs 1250

Now, Replacing the value of x in ( i ) in order to find the value of marked price

⇒

⇒

Replacing value of x in ( ii ) in order to find the value of selling price

⇒

⇒

Thus , Marked price of the fan = Rs 1500

Selling price of the fan = Rs 1230

Hope I helped!

Best regards!!

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

d

because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram