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Goryan [66]
3 years ago
14

Please please someone help

Mathematics
2 answers:
natka813 [3]3 years ago
7 0

The answer is the first one:

bc its not growing by a (-)1/2  and the 3rd one just doesnt make sense

PIT_PIT [208]3 years ago
4 0
The vertex form is y = x
Standard form is x + y = number
Move x to the other side
-x + y = 0
The coefficient on x cannot be negative so multiply the whole equation by -1.
x - y = 0
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Solve the following equation: <br>(n + 1) + 3(n - 1) = 2(n - 1)(n + 1)​
Mnenie [13.5K]

Answer:

n = 0, n =2

Step-by-step explanation:

Given

(n + 1) + 3(n - 1) = 2(n - 1)(n + 1) ← distribute parenthesis on both sides

n + 1 + 3n - 3 = 2(n² - 1), that is

4n - 2 = 2n² - 2 ( subtract 4n - 2 from both sides )

0 = 2n² - 4n ← factor out 2n from each term )

0 = 2n(n - 2)

Equate each factor to zero and solve for n

2n = 0 ⇒ n = 0

n - 2 = 0 ⇒ n = 2

7 0
3 years ago
Calcula la longitud en YARDAS de
tatiyna

Answer:

Las longitudes solicitadas en yardas son:

  • <u>Trayecto A = 109.361 yardas.</u>
  • <u>Trayecto B = 20.231785 yardas.</u>

Step-by-step explanation:

Para hacer la conversión de unidades que requieres en el ejercicio, debes saber que:

  • 1 metro = 1.09361 yardas

Con ese factor de conversión tú puedes hacer reglas de tres para calcular las medidas que requieres. En el caso del trayecto A:

Si:

  • 1 metro = 1.09361 yardas
  • 100 metros = X

Entonces:

  • x=\frac{100m *1.09361yardas}{1m}

Cancelamos metros y obtenemos:

  • x = 100 * 1.09361 yardas
  • <u>x = 109.361 yardas</u>

En este caso, <u>el trayecto A en yardas corresponde a 109.361 yardas</u>. El mismo procedimiento puede aplicarse para el trayecto B:

Si:

  • 1 metro = 1.09361 yardas
  • 18.50 metros = X

Entonces:

  • x = \frac{18.50m*1.09361yardas}{1m}

Cuando se cancelan los metros se obtiene:

  • x = 18.50 * 1.09361 yardas
  • <u>x = 20.231785 yardas</u>

Así, <u>el trayecto B en yardas corresponde a 20.231785 yardas</u>.

4 0
3 years ago
He loudness of a pile driver is 112 dB. About how many times the sound intensity of the jackhammer is the sound intensity of a p
chubhunter [2.5K]

Complete question :

The loudness of a jack hammer is 96 dB. Its sound intensity is about 0.004.

The loudness of a compactor is 94 dB. Its sound intensity is about 0.0025.

The sound intensity of the jack hammer is about 1.6 times the sound intensity of the compactor.

The loudness of a pile driver is 112 dB. About how many times the sound intensity of the jackhammer is the sound intensity of a pile driver? Round to the nearest ten.

Answer:

40

Step-by-step explanation:

Given that:

Sound intensity of jackhammer = 0.004

Sound intensity of compactor = 0.0025

Sound intensity of jackhammer is about 1.6 times the sound intensity of a compactor

Each factor of 10 in intensity corresponds to 10dB

Pile driver with loudness of 112dB ; 112 / 10 = 11.2

Hence, 10^11.2 = 1.58489 * 10^11

Hence, sound intensity (I) in watts per m²

I = 1.58489 * 10^11 * 10^-12

I = 1.58489 * 10-1

I = 0.158489

Comparing the intensity of pile driver and jackhammer :

Intensity of piledriver / Intensity of jackhammer

0.158489 / 0.004

= 39.622

= 40 (nearest ten)

3 0
3 years ago
Read 2 more answers
Simplify . 3 sqrt 10 + 7 sqrt 15 - 6 sqrt 10 -4 sqrt 15
andre [41]
Take the like terms of the equation.

3 \sqrt{10} - 6 \sqrt{10}

7 \sqrt{15} - 4 \sqrt{15}

Subtract those like terms together.

3 \sqrt{10} - 6 \sqrt{10} = -3 \sqrt{10}

7 \sqrt{15} - 4 \sqrt{15} = 3 \sqrt{15}

The simplified form of this equation is -3 \sqrt{10} + 3 \sqrt{15}.
6 0
3 years ago
What is the answer for 5B=5B/4+60
maks197457 [2]

Answer:

the answer would be b=16

4 0
3 years ago
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