All categories

4 years ago

What is the value of n in 9x27+2x31-28=n

Mathematics

2 answers:

rosijanka [135]4 years ago

6 0

243 + 62-28 = n
243 + 34 = n
277 = n
n= 277

jok3333 [9.3K]4 years ago

5 0

According to the order of operations multiplication and division are performed before addition and subtraction. Your expression contains two products. Evaluating those gives ...

... 243 + 62 - 28 = n

The order of operations has you evaluate addition and subtraction left to right.

... 305 - 28 = n . . . . . . . the sum of the first two operands

... 277 = n . . . . . . . . . . . the final sum

You might be interested in

A federal report found that a lie detector test given to someone telling the truth will suggest that they lied in about 20% of c

aleksley [76]

Answer:

$0.055$

Step-by-step explanation:

Let $p$ be the probability of lying an applicant, so, $p=20 \%$ .

$\Rightarrow p=\frac {20}{100}=\frac {1}{5}\;\cdots (i)$

Any applicant will either lie or will tell the truth.

Let $q$ be the probability of telling the truth, so, $q= 1-\frac {1}{5}$

$\Rightarrow q=\frac {4}{5}$

As for every applicant $p+q=1$ , so this is Bernoullies trials, for which

the probability of success of exactly $x$ times of an event out of $n$ trials is $P(x)=\binom {n}{x} p^xq^{n-x}\; \cdots (iii)$ .

Now, let $E$ be the event of at least one of the applicants is lying out of $11$ applicants, here the total number of applicants, $n=11$ .

So, $P(E)= P(x=1)+ P(x=2)+\cdots+ P(x=11)$

This is equivalent to

$P(E)=1-P(x=0)$ as $[P(x=0)+P(x=1)+ P(x=2)+\cdots+ P(x=11)=1]$

Now, from equation (iii),

$P(E)=1-\binom {11}{0} p^0q^{11-0}$

$\Rightarrow P(E)=1-11\left(\frac {1}{5}\right)^0\left(\frac {4}{5}\right)^{11}$ [from equations s (i) and (ii)]

$\Rightarrow P(E)=1-11\times 1 \times \left(\frac {4}{5}\right)^{11}$

$\Rightarrow P(E)=1-0.945$ (approx)

$\Rightarrow P(E)=0.055$

Hence, the probability that the lie detector indicates that at least one of the applicants is lying is $0.055.$

7 0

3 years ago

Help<br>I will mark as brainliest

Afina-wow [57]

Answer:

^3 divided by 512 goes to ^3 divided by 8x8x8

8^2 goes to ^2 divided by 8x8x8

Step-by-step explanation:

7 0

4 years ago

Read 2 more answers

If you roll a six sided die six times What is the best prediction possible for the number of times you will roll an even number?

spin [16.1K]

Answer:

chance is 50 percent or 1/2 so 3 times

Step-by-step explanation:

The die" has 6 sides with 3 odd numbers and 3 even numbers. If rolled 6 times, the chance would be 50 percent to roll an even number.

4 0

3 years ago

En una prueba de natación, Mario hizo el recorrido en ¾ de minuto y David en 4/5 de minuto ¿Cuál es la diferencia entre los dos

slamgirl [31]

Answer:

3 segundos

Step-by-step explanation:

De la pregunta anterior, se nos dice que:

En un evento de natación, Mario hizo el curso en ¾ de minuto

1 minuto = 60 segundos

Por lo tanto = 3/4 de minuto

= 3/4 × 60 segundos

= 45 segundos

David completó el curso en 4/5 de un minuto.

1 minuto = 60 segundos

Por lo tanto = 4/5 de un minuto

= 4/5 × 60 segundos

= 48 segundos

La diferencia entre los dos competidores se calcula como

48 segundos - 45 segundos

= 3 segundos.

Por lo tanto, la diferencia entre los dos competidores = 3 segundos.

6 0

3 years ago

Which equation describes this statement?

strojnjashka [21]

The answer is B.

You can't multiply, divide, or subtract because it says find the sum.

8 0

3 years ago