Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x?

Therefore, Option 1 is correct.

Step-by-step explanation:

We have been given the quadratic equation:

If we compare it will general quadratic equation which is:

Here, a=5,b=3 and c= -4.

Now, we will use the formula:

And then

Where,

Therefore, Option 1 is correct.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk