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mrs_skeptik [129]
3 years ago
14

Ted is taking a true-false test. He has a 90% chance of identifying the correct answer to each question. Unfortunately, there is

a 25% chance that he will circle the opposite of his intended answer. What is the probability, expressed as a percent, that Ted circles the correct answer to any particular question on this test?
Mathematics
1 answer:
TEA [102]3 years ago
8 0

Answer:

0.675

Step-by-step explanation:

given that Ted is  taking a true-false test. He has a 90% chance of identifying the correct answer to each question. Unfortunately, there is a 25% chance that he will circle the opposite of his intended answer.

For Ted circling the correct answer  to any particular question on this test,

first he has to identify the correct answer and then round the correct answer.

Probability for Ted circles the correct answer to any particular question on this test

= Prob for idenfitying correct answer and rounding correct answer

= P(identify correct answer)*P(rounds of correct answer)

= 0.90 ( 1-0.25)

= 0.675

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7x + 6(-3 + 4x) = 199<br>what does x equal?
tresset_1 [31]

Simplify. Note the equal sign. What you do to one side, you do to the other. Follow PEMDAS.

Isolate the x.

First, distribute 6 to all terms within the parenthesis

6(-3) = -18

6(4x) = 24x

7x - 18 + 24x = 199

Simplify. Combine like terms

31x - 18 = 199

Isolate the x. Add 18 to both sides

31x - 18 (+18) = 199 (+18)

31x = 199 + 18

31x = 217

Isolate the x. Divide 31 from both sides

31x/31 = 217/31

x = 217/31

x = 7

7 is your answer for x

hope this helps

8 0
3 years ago
The quotient of a number and 2 is the same as the difference of the number doubled and 3. What is the number?
Yanka [14]

Hi,

x/2 = 2x - 3

x/2 - 2x = - 3

x = 3 /(3/2)

x = 3 * 2/3 = 2

The number is 2.

7 0
3 years ago
On Monday, Kym spent 15 minutes folding the clothes. She took a bath for 25 minutes and then took 10 minutes to make her bed. Ky
Brut [27]
Ok. First, Kym went to bed at 8:30. There are only 60 minutes in an hour. 10 minutes to make her bed. 8:30 - 10 = 8:20. She had a 25 minute bath "jeez that's long" 8:20 - 25 = 7:55. Kym spent 15 minutes folding clothes: 7:55 - 15 = 7:40. She began to start folding clothes at 7:40.

Answer:<span> B. 7:40 p.m.
Or you could do it the easy way.
15 + 25 + 10 = 50

50 - 8:30 = 7:40
</span>

7 0
3 years ago
A house painter finds that he needs 20 minutes to set up his equipment before painting and then 5 minutes for every square foot
garri49 [273]
To answer this question you need to add 20 minutes to 5 times 800, which equals 4020, then you divide 4020 by 60 and your answer is 67!
8 0
3 years ago
HELP ME PLEASE <br> PLEASE PLEASE PLEASE PLEASE PLEASE
Nimfa-mama [501]

Answer:

19y+5

Step-by-step explanation:

Combine like terms look for all the numbers that have y attached and combine them

7y +12y=19y

Look for terms where nothing is attached it's just the number combine them

6-1=5

Put all together again and you get:

19y+5

8 0
3 years ago
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