What is the factor for x^2-4x-21
2 answers:
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Let be the length of the two sides that are the same.
Then the third side would be .
The perimeter of the triangle will come from adding all of the sides together and setting it equal to the value given, .
That is,
As for the answer, the question was cut short, but with ,
the length of each of the common sides is , making the third side
, to get a total perimeter of
.
The hypotenuse of a right-angled triangle is its longest side, the base is its lower side, and the perpendicular, which stands next to the right angle, is its standing line.
You may determine the sides of a right-angled triangle using a number of techniques, such as the Pythagoras theorem or the triangle's perimeter.
To learn more about sides of a triangle visit:
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Answer:
Step-by-step explanation:
First we calculate the number of possible ways to select 2 cards an ace and a card of 10 points.
There are 4 ace in the deck
There are 16 cards of 10 points in the deck
To make this calculation we use the formula of combinations
Where n is the total number of letters and r are chosen from them
The number of ways to choose 1 As is:
The number of ways to choose a 10-point letter is:
Therefore, the number of ways to choose an Ace and a 10-point card is:
Now the number of ways to choose any 2 cards from a deck of 52 cards is:
Therefore, the probability of obtaining an "blackjack" is: