Question

The area of a playing card is 70 square centimetres. The perimeter is 34 centimetres. What are the dimensions of the playing card?

Answer 1

Answer:

Take the length of the sides as x and y. So you can represent the given information with the following equations

2x + 2y = 34 (1)

xy = 70 (2)

(1) 2x = 34 - 2y

x = 17 - y

Substitute this into equation 2

y(17 - y) = 70

-y^2 + 17y = 70

y^2 - 17 + 70 = 0

(y - 10)(y-7) = 0

So the sides are 7cm and 10cm.

hope this will help

Answer 2

Step-by-step explanation:

follow the approch given. l+b =17 the only possibility left is 7*10