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vitfil [10]
3 years ago
14

Help me please I have an hour left

Mathematics
1 answer:
Sholpan [36]3 years ago
6 0

Answer:

x = 10

Step-by-step explanation:

If the horizontal lines are parallel, the intersecting line segments are proportionate

(5x - 2) / (6x + 6) = 40 / 55

          55(5x - 2) = 40(6x + 6)

          275x - 110 = 240x + 240

                     35x = 350

                          x = 10

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A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu
Nitella [24]

Answer: 0.9730

Step-by-step explanation:

Let A be the event of the answer being correct and B be the event of the knew the answer.

Given: P(A)=0.9

P(A^c)=0.1

P(B|A^{C})=0.25

If it is given that the answer is correct , then the probability that he guess the answer P(B|A)= 1

By Bayes theorem , we have

P(A|B)=\dfrac{P(B|A)P(A)}{P(B|A)P(A)+P(C|A^c)P(A^c)}

=\dfrac{(1)(0.9)}{(1))(0.9)+(0.25)(0.1)}\\\\=0.972972972973\approx0.9730

Hence, the student correctly answers a question, the probability that the student really knew the correct answer is 0.9730.

7 0
3 years ago
Find a factor of 3x^2- 16x - 12​
Greeley [361]

Answer:

x= -2/3 and 6

Step-by-step explanation:

3x²-16x-12

3x²-18x+2x-12

(3x²-18x)+(2x-12)

3x(x-6)+2(x-6)

(3x+2)(x-6)

x= -2/3 and 6

8 0
3 years ago
Read 2 more answers
The output is 11 more than the input<br> A: y=x+11<br> B: y=11x<br> C: y=x/11<br> D: x=y=11
Alchen [17]
The answer would be A
5 0
3 years ago
Da Pecture 30cm long 25cm wide is pasted
jeka57 [31]

Answer:

A=300cm^2

Step-by-step explanation:

find both areas and subtract the inside area

6 0
2 years ago
HELP PLEASE ASAP! 12 points
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Answer:

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