Solve x 2 + 9x + 8 = 0 by completing the square. what are the solutions? a.{1,-8} b.{1, 8} c.{-1,-8}

So firstly, what two terms have a product of 8x^2 and a sum of 9x? That would be x and 8x. Replace 9x with x + 8x:

Next, factor x^2 + x and 8x + 8 separately. Make sure that they have the same quantity on the inside:

Now you can rewrite the equation as

Now using zero product property, solve for x:

In short, the solutions are {-1,-8}, or C.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m