Mary bought a dress and a skirt
The dress had a 10 percent discount
while the skint had a 20 percent discount.
The original price of the dress was
$52. She paid & 70 for both the
dress and the purse. How much was
the original price of the skint?

$27.25

Step-by-step explanation:

Selling price of dress after discount = 52 - 5.2 = $47.8

So, cost of skirt after discount = 70 - 47.8 = $22.2

SO, original price of skirt :

80x/100 = 22.2

80x = 2220

x = 27.25

Hope this helps

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

well if he bought them at 5 cedis each sold them at 7 cedis each then he would make a profit of 2 cedis of each book. if in total he made 150 cedis profit that means he sold 75 books. he lost 12 books at the start so that means he originally bought a total of 82 books.

step-by-step explanation: