Gordon types 3,478 words in 47 minutes. Find the unit rate.

74 words per minute

Step-by-step explanation:

If the tiles

3478 words ———————-> 47 mins

?    Words ————————> 1 min

cross multiply

?=74

Then there are two real roots

Here we have D > 0 i.e Discriminant = 18

Hence, There are two real roots.

Step-by-step explanation:

Given:

To Find :

Which statement describes the roots form all Four options = ?

Solution:

For a Quadratic Equation:

The Discriminant is given as,

So if this Discriminant, say D,

Case 1 :

Then there are two real roots

Here we have D > 0 i.e Discriminant = 18

Hence, There are two real roots.

Case 2 :

If,

Then there are two complex roots.

Case 3 :

If,

Then there are Same and Real roots.