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Allushta [10]
3 years ago
11

How do you solve this problem?

title="x ^{2} - 2x - 3" alt="x ^{2} - 2x - 3" align="absmiddle" class="latex-formula">
Mathematics
2 answers:
scZoUnD [109]3 years ago
7 0

Answer:

hello :

x² - 2x - 3 = ( x² -2x +1 ) - 2²

                 = ( x - 1 )² -2²

                 = ( x - 1 - 2 ) ( x - 1  +2).....by idetity : a² - b² = (a - b) ( a + b )

                = ( x - 3 ) ( x + 1)

x² - 2x - 3 = 0  :  x - 3 = 0   or x + 1 = 0

so : x = 3 or x = -1



Evgesh-ka [11]3 years ago
6 0

Answer:

x = - 1, x = 3

Step-by-step explanation:

Consider the factors of the constant term ( - 3) which sum to give the coefficient of the x- term (- 2)

The factors are - 3 and + 1

(x - 3)(x + 1) ← in factored form

To solve equate to zero, that is

(x - 3)(x + 1) = 0

Equate each factor to zero and solve for x

x - 3 = 0 ⇒ x = 3

x + 1 = 0 ⇒ x = - 1


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O y = 2x is the answer
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Write2.1 as a mixed number and as an improper fraction.<br> Do not try to simplify your answers.
Elden [556K]

Answer:

2 1/10 and 21/10

Step-by-step explanation:

2.1 is 2 + 0.1 when expanded.

2 is just 2 and then 0.1 as a fraction is 1/10. The mixed number would be                 2 1/10.

The improper fraction  is just 21/10 (convert the mixed number into improper form).

Converting from mixed number to improper: <u>Multiply the number in the front (in this case 2) by the denominator. </u>

<u />

<u>That is 2 x 10 which is 20. Then add that number (20) to the numerator. 20 + 1 is equal to 21. </u>

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<u>21 would be our numerator and the denominator would stay the same (10). </u>

21/10 is the improper form.

8 0
3 years ago
At Mario's Pizza, a large pizza has a diameter of 18 inches. What is the area of two pizzas?
Oksanka [162]

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Mable has 185 dollars worth of apples. Each apple is worth more then 3 dollars but less then 10 dollars. The number has four let
velikii [3]

Answer:

The worth of each of Mable's apples is $5

Step-by-step explanation:

 Extracting the key information from the question:

***Mable has apples that are worth a combined 185 dollars.

*** One apple from Mable's apples worth more than three ($3) dollars but less than ten ($10) dollars.

***The cost of one apple is a number that has four letters.

*** That number (the cost) of one apple is also a prime number.

*** We are required to find or determine the worth of one of Mable's apples.

   Now, one of the clues given to us which we may use to figure out the cost or worth of one apple is that the apple is worth more than three dollars ($3) but worth less than ten dollars ($10). This means that each Mable's apple may worth $4 or $5 or $6 or $7 or $8 or $9. That is one of Mable's apples worth from $4 to $9

   Another clue to solving this puzzle is that the worth of one apple in dollars is a prime number. This implies that one of Mable's apples may worth either five dollars ($5) or seven dollars ($7).

   

  The next clue for unravelling this mystery is that all Mable's apples are worth a combined $185. This then means that the worth of each apple (the number) must be able to divide 185.

   Since $7 and $5 are the only two figures left standing, we will then try and see which one of them will be able to do divide the number "185".

 185/7  = 26 remainder 3

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 The final clue in the question is that the worth of each of Mable's apples is a figure/number that has only letters:

$7 SEVEN has = 5 letters

$5 FIVE has = 4 letters

 This now brings us to the conclusion that the worth of each of Mable's apples is five dollars ($5)  since it meets all the requirements and clues in the question.

6 0
3 years ago
I’m a little confused with this? Can someone walk me through this?
mina [271]

Answer:

A. 5.8

Step-by-step explanation:

From the given graph d has two coordinates;

the first coordinates of d = (0, 0)

the second coordinate of d = (-3 , -5), that is x = -3 when traced up and y = -5 when traced horizontal

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Option A is correct

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3 years ago
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