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3 years ago

What is the factored form of this equation? x^2-121

Mathematics

2 answers:

Alisiya [41]3 years ago

8 0

Answer:(x+11)(x-11)

Step-by-step explanation:

Elodia [21]3 years ago

6 0

Answer:

(x + 11)(x - 11)

Step-by-step explanation:

Since $x^{2}$ and 121 are both perfect squares ( $\sqrt{x^{2}$ = $x$ and $\sqrt{121}$ = $11$ ), we can write the difference of two perfect squares a and b in the factored form: $(\sqrt{a} +\sqrt{b} ) (\sqrt{a} - \sqrt{b} )$ . Therefore, the factored form of x^2 - 121 is (x +11)(x - 11).

Hope this helped! :)

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What is 2/3+3m/5=31/15? Please show your work! Thank You!

scZoUnD [109]

Answer:

m = $\frac{7}{3}$

Step-by-step explanation:

Given

$\frac{2}{3}$ + $\frac{3m}{5}$ = $\frac{31}{15}$

Multiply through by 15 to clear the fractions

15 is the lowest common multiple of 3, 5 and 15

10 + 9m = 31 ( subtract 10 from both sides )

9m = 21 ( divide both sides by 9 )

m = $\frac{21}{9}$ = $\frac{7}{3}$

4 0

3 years ago

A kite is flying 79 ft off the ground, and its string is pulled taut. The angle of elevation of the kite is 50°. Find the length

Art [367]

Answer:

If the kite has an 11 ft line attached to it and it casts an 8 feet shadow, we will have a rectangle triangle (see picture below).

To find the height x of the kite, we can apply the Pythagorean theorem.

x² = 11² - 8²

x² = 121 - 64

x² = 57

x =√57

Step-by-step explanation:

4 0

2 years ago

Please help.

Mariulka [41]

Step-by-step explanation:

A rational number can be written as a ratio a/b, where a & b are integers & b \neq 0. Rational numbers are terminating or repeating. The radical sign means "the positive square root of."

Example:

√144 = "the square root of 144" but indicates the positive square root of 144, which is 12

Hope this helps!!! :)

5 0

4 years ago

Read 2 more answers

F x =3x-2<br> If f(x) =8 find the value of x

Nookie1986 [14]

Answer:

Step-by-step explanation:

Plug in what is f(x) which is 8

so it would be 3(8)-2

which is 22

6 0

3 years ago

Zad.1 12 pracowników spytano o liczbę dni wykorzystanego urlopu. Oto odpowiedzi: 2, 5, 14, 3, 6, 5, 8, 2, 5, 4, 6, 8. Podaj domi

olganol [36]

Answer:

Taak 1.12

Mediaan is 5 en het gemiddelde is 5,67

Taak 2 13

De mediaan is 6

Het gemiddelde is 6

Standaarddeviatie is 3,32

Variantie is 11

Aantal werknemers is 13

Step-by-step explanation:

Taak.1 12 medewerkers is gevraagd naar het aantal verlofdagen. Hier zijn de antwoorden: 2, 5, 14, 3, 6, 5, 8, 2, 5, 4, 6, 8. Geef de dominante en de mediaan. Taak 2 13 medewerkers is gevraagd naar het aantal vakantiedagen. Hier zijn de antwoorden: 2, 4, 14, 3, 6, 7, 8, 2, 5, 4, 6, 8, 9. Geef de dominante en mediaan. Zad.3 Bereken de dominante en de mediaan a) Verblijfsafstand in km. b) Aantal werknemers a) b) 0-5 5 5-10 25 10-15 30 15-20 55 20-35 30 25-30 20 30-35 15

Taak. 1 12, wordt de mediaan gegeven door

2, 5, 14, 3, 6, 5, 8, 2, 5, 4, 6, 8 herschikken, we krijgen

2, 2, 3, 4, 5, 5, 5, 6, 6, 8, 8, 14

Daarom is de mediaan 5 en het gemiddelde 5,67

Taak 2 13

2, 4, 14, 3, 6, 7, 8, 2, 5, 4, 6, 8, 9 herschikken, we krijgen

2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 14

De mediaan is het zevende nummer in de rij = 6

Het gemiddelde is ook = 6

Standaarddeviatie = 3,32

Variantie = 11

Aantal werknemers = som van frequentie of aantal gegevens = 13.

4 0

4 years ago