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maw [93]
3 years ago
14

How do you solve 42+2x=5.50x

Mathematics
2 answers:
tangare [24]3 years ago
7 0
U can’t that’s ur answer bc u can’t add if there’s an x
Snezhnost [94]3 years ago
5 0
X=12 but then u still can’t really solve it since that’s ur answer
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In answering a question on a multiple-choice test, a student either knows the correct answer or guesses it. Let 0.7 be the proba
Dahasolnce [82]

Answer:

The probability is 0.9211

Step-by-step explanation:

Let's call K the event that the student know the answer, G the event that the student guess the answer and C the event that the answer is correct.

So, the probability P(K/C) that a student knows the answer to a question, given that she answered it correctly is:

P(K/C)=P(K∩C)/P(C)

Where P(C) = P(K∩C) + P(G∩C)

Then, the probability P(K∩C) that the student know the answer and it is correct is:

P(K∩C) = 0.7

On the other hand, the probability P(G∩C) that the student guess the answer and it is correct is:

P(G∩C) = 0.3*0.2 = 0.06

Because, 0.3 is the probability that the student guess the answer and 0.2 is the probability that the answer is correct given that the student guess the answer.

Therefore, The probability P(C) that the answer is correct is:

P(C) = 0.7 + 0.06 = 0.76

Finally, P(K/C) is:

P(K/C) = 0.7/0.76 = 0.9211

7 0
3 years ago
Quality T-Shirts sells shirts in bulk. The cost is a
adell [148]

Answer:

ok

Step-by-step explanation:

it was a different question in our lesson

4 0
3 years ago
Melissa bought 42 pine seedlings and 30 juniper seedlings
hram777 [196]

Answer:

See below

Step-by-step explanation:

GCF (greatest common factor ) of 42 and 30   is  6

  each row will have 6 seedlings

     there will be  (  42+30) / 6 = 12 rows

                   7 pine rows    5 juniper rows

8 0
2 years ago
Write the verbal phrase as an algebraic expression. use x for the variable in your expression.
devlian [24]
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1. x-10
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3 years ago
Robin will choose a movie from the Red Box when all movies are in stock. If she
Alex777 [14]

Answer:

32

Step-by-step explanation:

7 0
2 years ago
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