What value of c makes the polynomial below a perfect square?
x^2+16x+c
c=

c=64

Step-by-step explanation:

A perfect square is a number made by squaring another number, such as 4 x 4 or 5 x 5.

Think about how you would normally factor a trinomial. When doing so, you need two numbers that multiply together to give you the third term (c in this case) and add together to give you the middle term (16 in this problem).

Ask yourself, what numbers can I add to get 16 and multiply to get a perfect square? The number you are looking for here is 8.

So, the perfect square of this trinomial would be x^2+16x+64 because 8 x 8 is 64 and 8 + 8 is 16.

The factored version of it would be

(x+8)(x+8)

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