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Ostrovityanka [42]
3 years ago
11

I already made an attempt at this question and I would just like to check my answer z = ?

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
5 0

So we have the equation:

\frac{z+9}{4}=2.1

Then we need to multiply by 4 on both sides to get rid of the denominator on the left:

z+9=8.4

Then we subtract 9 on both sides to solve for z:

z=-0.6

Therefore the answer is z = -0.6.

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Jane gets paid $120 for 8 hours. How much does she get paid an hour?​
AleksAgata [21]

Answer:

$15 an hour

Step-by-step explanation:

To find this, we divide 120 by 8.

120 ÷ 8 = 15

So Jane gets $15 an hour

I hope this helped, please mark Brainliest, thank you!

8 0
2 years ago
Question 4 options: Find the mean and standard deviation for a binomial distribution with 680 trials and a probability of succes
lys-0071 [83]

Answer:

Mean for a binomial distribution = 374

Standard deviation for a binomial distribution = 12.97

Step-by-step explanation:

We are given a binomial distribution with 680 trials and a probability of success of 0.55.

The above situation can be represented through Binomial distribution;

P(X=r) = \binom{n}{r}p^{r} (1-p)^{n-r} ; x = 0,1,2,3,.....

where, n = number of trials (samples) taken = 680 trials

            r = number of success  

           p = probability of success which in our question is 0.55

So, it means X <em>~ </em>Binom(n=680, p=0.55)

<em><u>Now, we have to find the mean and standard deviation of the given binomial distribution.</u></em>

  • Mean of Binomial Distribution is given by;

                    E(X) = n \times p

       So, E(X) = 680 \times 0.55 = 374

  • Standard deviation of Binomial Distribution is given by;

                   S.D.(X) = \sqrt{n \times p \times (1-p)}

                               = \sqrt{680 \times 0.55 \times (1-0.55)}

                               = \sqrt{680 \times 0.55 \times 0.45} = 12.97

Therefore, Mean and standard deviation for binomial distribution is 374 and 12.97 respectively.

3 0
3 years ago
How do i write this problem
ratelena [41]
3-(s+4) 
less than- subtract
sum- addition 

since it said 3 less than the sum of a number and 4 that means you would have to add s and 4
5 0
2 years ago
Read 2 more answers
A salesperson earns $8 per hour plus 6% commission on her sales. In a week when she worked 40 hours, her total earnings were $69
mash [69]

Answer:

372

Step-by-step explanation:

8x40=320

692-320=372

5 0
2 years ago
3x-8=25 solve for x
VMariaS [17]
Add 8 to both sides
3x=33
Divide both sides by 3 
x=11

7 0
3 years ago
Read 2 more answers
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