Which of these best describes the Pythagorean theorem?

A) All of the answers are correct.
B) The sides of a right triangle are related to each other.
C) The sum of the squares of the smaller sides of a right triangle equal the square of the largest side.
D) A-squared plus B-squared equals C-squared.

A)

Step-by-step explanation:

The theorem states that if a right triangle has two sides equal to a and b, and a hypotenuse equal to c, then a squared plus b squared equals c squared.

the square of the length of the hypotenuse of a right triangle equals the sum of the squares of the lengths of the other two sides.

hope this help please mark me

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

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