Question

7 th toughest question in maths???? ​

Answer 1

1/x + 1/y = 20

5/x + 15/y = 45

find x and y.

Answer 2

Step-by-step explanation:

1. If a,b,c,d are positive integers with sum of 63 then what is the max. value of ab+bc+cd.

2. if

${4}^{x} + {6}^{x} = {9}^{x}$

then find x.

3.A horse is tied to an outside garden of a 20 foot by 10 foot rectangular barn what is the max. area the horse can gaze ,if the rope of length L?

when

L=5

L=25

L=20

L=100

hope it helps