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Bond [772]
3 years ago
14

Solve for the value of x. x + 4° 134°

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
4 0

Step-by-step explanation:

The answer is 130° since you subtract 4° from both sides

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The length of time that an auditor spends reviewing an invoice is approximately normally distributed with a mean of 600 seconds
Bumek [7]
Answer: 11.5% 

Explanation:


Since 1 minute = 60 seconds, we multiply 12 minutes by 60 so that 12 minutes = 720 seconds. Thus, we're looking for a probability that the auditor will spend more than 720 seconds. 

Now, we get the z-score for 720 seconds by the following formula:

\text{z-score} =  \frac{x - \mu}{\sigma}

where 

t = \text{time for the auditor to finish his work } = 720 \text{ seconds}
\\ \mu = \text{average time for the auditor to finish his work } = 600 \text{ seconds}
\\ \sigma = \text{standard deviation } = 100 \text{ seconds}

So, the z-score of 720 seconds is given by:

\text{z-score} = \frac{x - \mu}{\sigma}
\\
\\ \text{z-score} = \frac{720 - 600}{100}
\\
\\ \boxed{\text{z-score} = 1.2}

Let

t = time for the auditor to finish his work
z = z-score of time t

Since the time is normally distributed, the probability for t > 720 is the same as the probability for z > 1.2. In terms of equation:

P(t \ \textgreater \  720) 
\\ = P(z \ \textgreater \  1.2)
\\ = 1 - P(z \leq 1.2)
\\ = 1 - 0.885
\\  \boxed{P(t \ \textgreater \  720)  = 0.115}

Hence, there is 11.5% chance that the auditor will spend more than 12 minutes in an invoice. 
8 0
3 years ago
Solve for d.<br><br> 13d + 4 = 43<br><br> A.3<br><br> B.13<br><br> C.39<br><br> D.None of the above
sergejj [24]
Answer is A
Because 43-4=39
39/13=3
6 0
3 years ago
Read 2 more answers
Is it greater than, Less than, or equal to?
frosja888 [35]
The answer is greater than
5 0
3 years ago
Read 2 more answers
Find the solution of the system of equations 3x+4y=10 and x−y=1. Give the x value followed by the y value, separated by a comma.
Burka [1]

Answer:

x,y =2,1

Step-by-step explanation:

3x+4y=10          ................equ1

x-y=1                 ................equ2

This system of equations forms a quadratic equation.

Lets use the substitution method in solving this set of equations

from equ 2;  x=y+1

substitute x=y+1 into equ 1

3(y+1) +4y=10

3y+3+4y=10

7y=10-3

7y=7

y=7/7

y=1

but x=y+1

substitute the value of y into this equation to get x

x= 1+1

x=2

x,y=2,1

5 0
3 years ago
Can someone help me please?
Liono4ka [1.6K]
The answer is B. 315
6 0
3 years ago
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