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svp [43]
3 years ago
5

You and your friend decide to get your cars inspected. You are informed that ​83% of cars pass inspection. If the event of your​

car's passing is independent of your​ friend's car. please help me with d! an explanation with steps would be nice but mandatory

Mathematics
1 answer:
goldenfox [79]3 years ago
7 0
It has to be d because this app sucks
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Simplify 6 / (7+3i).
user100 [1]

Answer:

To simplify the following expression: 6 / (7+3i), we're going to multiply and divide the entire expression by (7+3i), as follows:

\frac{6 (7-3i)}{ (7+3i)(7-3i)} = \frac{42-18i}{58} = 0.72 - 0.31i

Now, the denominator has NO imaginary numbers.

5 0
4 years ago
Read 2 more answers
Which are true and which are false? 2+5=8-1. 4+2=9-1. 13-0=12+1
stiks02 [169]

Hi there,

I believe there are 3 questions.

  1. 2+5=8-1 It is true because 2+5 is 7 and 8-1 is 7. So, both sides have same value which means they are equal.
  2. 4+2=9-1 It is false because 4+2 is 6 and 9-1 is 8. So, the values are different.
  3. 13-0=12+1 It is true because 13-0 is 13 and 12+1 is 13. Both values are same. Therefore, they are equal.

Hope it helps :-)

4 0
3 years ago
PLS HELP ASAP<br><br><br><br> What is the measure of
dolphi86 [110]
30 sorry if I’m wrong
5 0
3 years ago
Simplify. <br>(-6u? - 9u-4)-(-5u²+2u+3)+(2u? + 6u+4)​
zheka24 [161]

Answer:

Simplified: -4u? + 5u^2 - 5u - 3

Step-by-step explanation:

8 0
3 years ago
A screening examination was performed on 250 persons for Factor X, which is found in disease Y. A definitive diagnosis for disea
ZanzabumX [31]

Answer:

The specificity of this test is expressed as:________

70%.

Step-by-step explanation:

a) Data and Calculations:

TEST RESULTS       Disease Present    Disease Absent      Total

Positive for Factor X      40                            60                    100

Negative for Factor X    10                            140                   150

Total                              50                           200                  250

Negative for X and Disease Absent = 140/200 * 100

= 0.7 * 100

= 70%

b) The specificity refers to the percentage of people who test negative for a specific disease among a group of people who do not have the disease. No test is 100% specific because some people who do not have the disease X will test positive for it (false positive).  Therefore, we are testing for the true negative, that the 140 people who tested out of the 200 people who do not have the disease.

8 0
3 years ago
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