For this we simply divide the total ft. by the ft. in a mile
Factor completely. x^2+3x−40
2 answers:
Factorised form: 
Explanation:
This is a quadratic equation, so the easiest way to solve this is by splitting up the middle term. What are two numbers that when multiplied gives -40, and adds to give 3? (8, -5)
You can then split up the middle term like so:
x² + 8x - 5x - 40 = 0
and factorise x² + 8x and -5x -40.
x(x + 8) -5(x + 8) and group together like terms:
Explanation:
This is a quadratic equation, so the easiest way to solve this is by splitting up the middle term. What are two numbers that when multiplied gives -40, and adds to give 3? (8, -5)
You can then split up the middle term like so:
x² + 8x - 5x - 40 = 0
and factorise x² + 8x and -5x -40.
x(x + 8) -5(x + 8) and group together like terms:
You might be interested in
There are NO SOLUTIONS.
Substitute the first equation for y in the second equation. You can see it does not work. 6 does not equal 8. Therefore there are no solutions.
Substitute the first equation for y in the second equation. You can see it does not work. 6 does not equal 8. Therefore there are no solutions.