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nlexa [21]
3 years ago
5

Factorise x^2-6 need help for my hegarty maths

Mathematics
1 answer:
Ganezh [65]3 years ago
5 0

you can't factorize it in rational numbers

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I need help it's really hard<br>Properties of exponents
Agata [3.3K]

\bf 12^x\times 12^4=12^8\implies \stackrel{\textit{if the base is the same, so are the exponents}}{12^{x+4}=12^8} \\\\\\ x+4=8\implies x=4

3 0
3 years ago
Zoey wants to use her computer tablet throughout a 6-hour flight. Upon takeoff, she uses the tablet for 2 hours and notices that
mojhsa [17]

6 hours Zoey can expect from the tablet on a full battery charge if the battery dropped by 33%, from 100% to 67%.

<h3>What is percentage?</h3>

It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.

We have:

Zoey wants to use her computer tablet throughout a 6-hour flight. Upon takeoff, she uses the tablet for 2 hours and notices that the battery dropped by 33%, from 100% to 67%.

Let's suppose x hours Zoey can expect from the tablet on a full battery charge.

The value of x can be calculated using:

x = (2×100)/33

x = 200/33

x = 6.06 ≈ 6 hours

Thus, 6 hours Zoey can expect from the tablet on a full battery charge if the battery dropped by 33%, from 100% to 67%.

Learn more about the percentage here:

brainly.com/question/8011401

#SPJ1

7 0
2 years ago
What is the answer to these three questions and how did you get them?
ludmilkaskok [199]
#1. I think the answer is B because when you estimate, round 328.9 to 329 and 7 3/4 to 8. Divide 329 by 8 which is 41.125 which is closest to 40.

#2. 25% because 25% times 80 is 20.


7 0
3 years ago
How do you model a decimal using a fraction
const2013 [10]

Answer:

If we have to model a decimal using fraction , This is the way you should write

 1.\rightarrow a.b_{1}=\frac{ab_{1}}{10\text{or}(10^1)}\\\\2.\rightarrow a.b_{1}b_{2}=\frac{ab_{1}b_{2}}{100\text{or}(10^2)}\\\\ 3.\rightarrow a.b_{1}b_{2}b_{3}=\frac{ab_{1}b_{2}b_{3}}{1000\text{or}(10^3)}\\\\............\\\\\text{General rule}\\\\n.\rightarrow a.b_{1}b_{2}b_{3}.......b_{n}=\frac{ab_{1}b_{2}b_{3}.....b_{n}}{1000.....0\text{or}(10^n)}

4 0
3 years ago
Read 2 more answers
en una caja hay 8 canicas cinco rojas y tres verdes y la Bola que se retira no se reemplaza determina Cuál es la probabilidad de
postnew [5]

Answer: 0.107

Step-by-step explanation:

En una caja tenemos 8 canicas.

5 son rojas

3 son verdes.

Se retira una canica, y no se remplaza.

Quiero calcular la probabilidad de sacar dos canicas verdes.

La probabilidad de sacar una canica verde en el primer intento, es igual al cociente entre el numero de canicas verdes y el numero total de canicas.

p1 = 3/8  

Ahora, en el segundo intento, en la caja voy a tener 2 canicas verdes (por que ya saque una) y 7 canicas en total. Entonces la probabilidad va a ser:

p2 = 2/7.

Y la probabilidad conjunta (es decir, la probabilidad de sacar las dos canicas de color verde) va a ser igual al producto de las probabilidades individuales.

P = p1*p2 = (3/8)*(2/7) = 0.107

8 0
3 years ago
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