Melissa makes apple pies and sells them with a markup of 78%. write an equation representing the retail price y of melissa's apple pies in terms of the original cost x.

Equation representing the retail price y of apple pies in terms of the original cost x  is      y = 1.78 x

Step-by-step explanation:

The original cost of apple pie = x

The mark up percentage = 78%

The retail price of the apple pie = y

Now, the mark up is always applied on the original price.

⇒78%  of x  =

So, the marked up amount of pie = 0.78 x

Also, the Total Retail price = Original Price + Marked up Price

                                             = x+ 0.78 x = (1+ 0.78)x  =  1.78 x

or, y = 1.78 x

Hence,equation representing the retail price y of apple pies in terms of the original cost x  is y = 1.78 x

x=y/1.78

Step-by-step explanation:

If you know the original value then you would multiply by 1.78 to calculate the price after markup. Thus if you know the price after markup you divide by 1.78 to find the original value.

y=markup price

x=original price

y=1.78x

Divide both sides by 1.78

y/1.78=x

x=y/1.78

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm