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Andru [333]
3 years ago
14

Question Help! Factor the trinomial completely. x squared + 2x -8

Mathematics
1 answer:
blsea [12.9K]3 years ago
5 0
X^2 + 2x -8
The factors of 8 are 2 and 4, and to get 2x we need 2 and 4 to either add up to or subtract to result in 2.
4 - 2 = 2. We also know this is right because 4 x -2 = -8. So the answer is:
(x + 4)(x - 2)
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Marina86 [1]
\bf slope = m = \cfrac{rise}{run} \implies 
\cfrac{ f(x_2) - f(x_1)}{ x_2 - x_1}\impliedby 
\begin{array}{llll}
average~rate\\
of~change
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-------------------------------\\\\

\begin{array}{ccll}
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\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
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5 0
3 years ago
Equivalent expression 7+3-2=
Oxana [17]

Answer:

Step-by-step explanation:

7+3-2=3+7-2

6 0
3 years ago
Two cards are drawn with replacement, one after the other, and the outcomes recorded. What is the probability that at least one
babymother [125]

Answer:

The probability is 0.231

Step-by-step explanation:

In this question, we are tasked with calculating the probability that out of two cards drawn with replacement from a pack of cards , at least one of the two is a face card.

In a standard pack of cards, there are 52 cards.

Now let’s calculate the number of face cards we have.

There are 12 face cards in a pack of cards. There are 4 of each of Jack, Queen or King

The probability of drawing a face card is 12/52 = 3/13

Now, we want to calculate the probability of at least one of the cards drawn are face cards.

Mathematically, what we are needing to calculate is

Probability of drawing a single face card or probability of the two being a face card

Now let’s calculate.

The probability of the first card drawn being a face card is 3/13. The probability of the second card not being a face card will be 1-3/13 = 10/13

The joint probability under this first set of condition will be 3/13 * 10/13 = 30/169

Now, for the second condition, here we are considering that both cards drawn are face cards. What we have is 3/13 * 3/13 = 9/169

Now in probabilities, whenever we are having the statement or, we add the probabilities together

Thus, the probability here would be 30/169 + 9/169 = 39/169 = 3/13

In decimal this will be 0.231

8 0
2 years ago
The scale drawing of a backyard includes a tennis court 10cm x 5.5cm. If the drawing has a scale
Natasha2012 [34]

Step-by-step explanation:

2.5 m = 250 cm

so, the scale factor is 1/250

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so,

3,437,500 cm² = 343.75 m²

5 0
2 years ago
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