dont understand this ​

Answer:

18 hours

Step-by-step explanation:

Time taken to complete the job by 1st company = [tex]72\ \text{hours}[/tex]

Time taken to complete the job by 2nd company = [tex]24\ \text{hours}[/tex]

The job completed in 1 hour by 1st company = [tex]\dfrac{1}{72}\ \text{job}[/tex]

The job completed in 1 hour by 2nd company = [tex]\dfrac{1}{24}\ \text{job}[/tex]

The amount of job completed in 1 hour if they both work together[tex]1\ \text{hour}=\dfrac{1}{72}+\dfrac{1}{24}=\dfrac{1}{18}\ \text{job}\\\Rightarrow 1\ \text{job}=\dfrac{18}{1}\ \text{hours}=18\ \text{hours}[/tex]

So, if both companies work together it will take 18 hours to finish the job.

Answer:

Step-by-step explanation:

Since 100 CM equals 1 Meter,

165 CM equals 1.65 Meters.

Hope this helps! <3

Answer:

1.65 meters

Step-by-step explanation:

100 cm = 1 m

165 cm = 1.65 m

Sorry that i can't explain more, i hope this helps though!

Answer:

3

Step-by-step explanation:

Any definite number (except zero) to the power one is one

So

3x^0

3 • 1

3

Answer:

y= 9

x= 10

Explanation:

I don't really know if this is correct-

Complete Question

Random variable X has CDF given as follows

        [tex]F(x)_x = \left \{ {{{{{{{ 0 \ \ \ \ \ \ \ \ \ \ x < 0} \atop {\frac{8}{33}} \ \ \ \ \ \ 0 \le x \le 1} \atop{ \frac{5}{11} }\ \ \ \ \ 1 \le x \le 2 } \atop {\frac{7}{11} } \ \ \ \ \ \ 2 \le x \le 3} \atop{ \frac{26}{33} }\ \ \ \ \ 3 \le x \le 4 }\atop {\frac{10}{11} } \ \ \ \ \ \ 4 \le x \le 5} \atop{ 1}\ \ \ \ \ \ \ \ 5 \le x } \right.[/tex]

Find the PMF of X.Find the PMF of X, and confirm that it is a valid PMF.  

Answer:

Generally the PMF is

      X               0        1       2      3         4       5  

    P(X = x)      [tex]\frac{8}{33}[/tex]        [tex]\frac{7}{33}[/tex]      [tex]\frac{2}{11}[/tex]     [tex]\frac{5}{33}[/tex]        [tex]\frac{4}{33}[/tex]     [tex]\frac{1}{11}[/tex]

Generally to prove the validity of the PMF we add the probabilities , if it is equal to  1 then the PMF is valid otherwise , the PMF is not valid

So

      [tex]\sum P(X = x) = \frac{8}{33} + \frac{7}{33} + \frac{2}{11} + \frac{5}{33} + \frac{4}{33}+ \frac{1}{11}[/tex]

      [tex]\sum P(X = x) =1[/tex]

Hence the PMF is valid

Step-by-step explanation:

Generally the probability of  X = 0  is evaluated as

       [tex]P(0) = F(0) \ \ (for \ x \le 0) - F(0) \ ( for \ x < 0)[/tex]

=>    [tex]P(0) = \frac{8}{33} - 0[/tex]

=>    [tex]P(0) = \frac{8}{33}[/tex]

Generally the probability of  X = 1  is evaluated as

       [tex]P(1) = F(1) \ \ (for \ 1 \le 0) - F(1) \ ( for \ x < 1)[/tex]

=>    [tex]P(1) = \frac{5}{11} - \frac{8}{33}[/tex]

=>    [tex]P(1) = \frac{7}{33}[/tex]

Generally the probability of  X = 2  is evaluated as

       [tex]P(2) = F(2) \ \ (for \ 2 \le x ) - F(2) \ ( for \ x < 2)[/tex]

=>    [tex]P(2) = \frac{7}{11} - \frac{5}{11}[/tex]

=>    [tex]P(2) = \frac{2}{11}[/tex]

Generally the probability of  X = 3  is evaluated as

       [tex]P(3) = F(3) \ \ (for \ 3 \le x ) - F(3) \ ( for \ x < 3)[/tex]

=>    [tex]P(3) = \frac{26}{33} - \frac{7}{11}[/tex]

=>    [tex]P(3) = \frac{5}{33}[/tex]

Generally the probability of  X = 4  is evaluated as

       [tex]P(4) = F(4) \ \ (for \ 4 \le x ) - F(4) \ ( for \ x < 4)[/tex]

=>    [tex]P(4) = \frac{10}{11} - \frac{26}{33}[/tex]

=>    [tex]P(4) = \frac{4}{33}[/tex]

Generally the probability of  X = 5  is evaluated as

       [tex]P(5) = F(5) \ \ (for \ 5 \le x ) - F(5) \ ( for \ x < 5)[/tex]

=>    [tex]P(5) = 1- \frac{10}{11}[/tex]

=>    [tex]P(5) = \frac{1}{11}[/tex]

Generally the PMF is

      X               0        1       2      3         4       5  

    P(X = x)      [tex]\frac{8}{33}[/tex]        [tex]\frac{7}{33}[/tex]      [tex]\frac{2}{11}[/tex]     [tex]\frac{5}{33}[/tex]        [tex]\frac{4}{33}[/tex]     [tex]\frac{1}{11}[/tex]

Generally to prove the validity of the PMF we add the probabilities , if it is equal to  1 then the PMF is valid otherwise , the PMF is not valid

So

      [tex]\sum P(X = x) = \frac{8}{33} + \frac{7}{33} + \frac{2}{11} + \frac{5}{33} + \frac{4}{33}+ \frac{1}{11}[/tex]

      [tex]\sum P(X = x) =1[/tex]

Hence the PMF is valid

Answer:

We will find the value of each of the option to see which one is different

a) The opposite of 8

the opposite of 8 is -8

b) The distance between 5 and -3

distance is a scalar value and can NEVER be negative

So, distance = 8

c) The absolute value of 8

the absolute value of 8 is the modulus of 8

|8| = 8

d) The opposite of -8

the opposite of -8 is 8

From the above, we can see that the second, third and fourth options are equal except the first option

Answer:

Yes

Step-by-step explanation:

Because 7x 7=49

Or 49 divided by 7 is 7

Answer:

yes

Step-by-step explanation:

b/c the sq root of 49 is 7

Answer:

bro u just made my brain explode lollllllllllllllllllllllllllllll

Answer: The answer should be or somewhere around 991.13700

Answer:

I think you have chosen the right answer.

Answer: your answer is right

Step-by-step explanation:

The total cost of Robert's purchase is $32.657625.

Given that, Robert spends $30.45 before tax at the book store and the sales tax rate in his city is 7.25%.

We need to find the total cost of his purchase.

A sales tax is a consumption tax imposed by the government on the sale of goods and services.

The total cost = 30.45+7.25% of 30.45

=30.45 + 0.0725 × 30.45

=30.45 + 2.207625

=32.657625

Therefore, the total cost of Robert's purchase is $32.657625.

To learn more about sales tax visit:

https://brainly.com/question/27092799.

#SPJ2

Answer:

28 because 8 plus 8 plus 6 plus 6 sooooo 28:) brainly?

Step-by-step explanation:

Answer:

x=v+w/k

Step-by-step explanation:

Answer:

x = [tex]\frac{v+w}{k}[/tex]

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

if you add up the amount of dances she has to do, it equals 7. then you divide 21 by 7, which equals 3. then, you have to find the amount of dances she has already done, which would be 3 × 3 which equals 9.

Answer:

999 LUV

Step-by-step explanation:

LND LLJW999

Answer:

Springtown Cafe

Step-by-step explanation:

If you want to be sure, find a common denominator. 9 and 10 are the denominators of each fraction. Find the multiples of each (9's multiples would be 9, 18, 27, etc.) and find a common multiple between the two. In this case, it would be 90. Multiply the denominator to get the common denominator. 9 x 10 = 90, 10 x 9 = 90. Remember to multiply both the top and bottom.

5/9 = 50/90

3/10 = 27/90

Now, we can clearly see that 5/9 is larger than 3/10.

So, Springtown cafe has a greater fraction of customers who left good tips.

In the equation assign each number a letter:

A = -0.5, b = 2 and c = -5

Maximum = -b/2a = -2/2(-0.5) = 2

Minimum = replace x in the equation with the maximum and solve for y:

-0.5(2)^2 +2(2) -5 = -3

Maximum and minimum = (2,-3)

Answer:

Each small square represents 0.1 units.

Step-by-step explanation:

Answer:

It should equal 0.1 unit units each.

sorry if wrong.

Answer:

x=6

Step-by-step explanation:

h(x)=-20 is the same as saying y=-20, so you would substitute h(x) with -20 and solve the equation from there.

[tex]-20=-4x+4[/tex]

[tex]-4[/tex]               [tex]-4[/tex]

---------------------

[tex]\frac{-24}{-4} =\frac{-4x}{-4}[/tex]

[tex]6=x[/tex]

Answer:

R = ∞

I = (-∞, ∞)

Step-by-step explanation:

Use the ratio test:

lim(n→∞)│aₙ₊₁ / aₙ│

lim(n→∞)│[xⁿ⁺⁶ / (2(n+1)!)] / [xⁿ⁺⁵ / (2n!]│

lim(n→∞)│[xⁿ⁺⁶ / (2(n+1)!)] × (2n! / xⁿ⁺⁵)│

lim(n→∞)│x 2n! / (2(n+1)!)│

lim(n→∞)│n! / (n+1)!││x│

lim(n→∞) (1 / (n+1))│x│

0

The series converges if the limit is less than 1.

The limit is always less than 1, so the radius of convergence is infinite.

So the interval of convergence is (-∞, ∞).

Answer:

15 protons, 15 neutrons and 18 electrons (3rd one) is the answer

Step-by-step explanation:

Answer:

220%

Step-by-step explanation:

you have to subtract 16 to 5 wich gives u 11 then u put that over five and divide and then u get 2.222222 repeating so it is 2.2 then you move the decimal to the left which gives you 220% hope this helps

Answer:

97

Step-by-step explanation:

You would need to divide 485/5 to find how many trees in each orchard

485/5 = 97

Answer:

C: 92 miles

Step-by-step explanation:

Took test

Answer:

C the correct answer

Step-by-step explanation:

took the test

Answer:

D

Step-by-step explanation:

you can't divide by zero

Answer:

26.89

Step-by-step explanation:

Answer:

78

Step-by-step explanation:

dont use this

Answer:

sí, permanece así, todo lo que hace es mover las formas, no cambia la distancia entre sí ni la forma o tamaño de las mismas

Step-by-step explanation:

Espero que esto ayude :)

Answer:

0.040

Step-by-step explanation:

We solve using z score

z = (x-μ)/σ,

where x is the raw score = 70 in

μ is the population mean = 63 in

σ is the population standard deviation = 4 in

z = 70 - 63 /4

z = 7/4

= 1.75

Probability value from Z-Table:

P(x<70) = 0.95994

P(x>70) = 1 - P(x<70)

= 0.040059

The probability that a random sample of 45 kangaroos has an average of height that is greater than 70 inches

is 0.040