(4x+5y=0) (8x-15y=5) stimutanious equations

The solution is x = 0.25, y = -0.20.

or you can write it as (0.25, -0.20).

Step-by-step explanation:

4x + 5y = 0

8x - 15y = 5

Multiply the first equation by 3:

12x + 15y = 0     Now add this to the second equation:

20x = 5

x = 0.25.

Now substitute for x in equation 1:

4(0.25) + 5y = 0

1 + 5y = 0

5y = -1

y = -0.20.

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: