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gulaghasi [49]
3 years ago
7

In a test consisting of 12 questions, each student gets a score of +23 for every correct answer and −13 for every incorrect answ

er. Each question must be answered. Ram gets 7 correct and 5 incorrect answers. What's his score?
Mathematics
1 answer:
pentagon [3]3 years ago
4 0

Answer:

96 scores

Step-by-step explanation:

Score for each correct answer = +23

Score for each incorrect answer = -13

Each question must be answered such that Ram gets 7 correct and 5 incorrect answers.

Number of correct answers =7

Number of incorrect answers =5

Therefore,

Ram's score =7(23)+5(-13)=161-65=96

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Four points are labeled on the number line which point represents the value of -1/2
ololo11 [35]
Don’t listen to the people who give you the links
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3 years ago
A printer has a contract to print 100,000 posters for a political candidate. He can run the posters by using any number of plate
yulyashka [42]

Answer:

25

Step-by-step explanation:

From the given information;

Numbers of posters that can be printed in an hour = no of impression/hour × no of plate utilized in each impression.

= 1000x

Thus, the required number of hours it will take can be computed as:

\implies \dfrac{100000}{1000x} \\ \\ =\dfrac{100}{x}

cost per hour = 125

If each plate costs $20 to make, then the total number of plate will equal to 40x

∴

The total cost can be computed as:

C(x) = (\dfrac{100}{x}) \times 125 + 20 x --- (1)

C'(x) = (-\dfrac{12500}{x^2})  + 20  --- (2)

At C'(x) = 0

\dfrac{12500}{x^2} = 20

\dfrac{12500}{20} = x^2

x^2= 625

x = \sqrt{625}

x = 25

C'' (x) = -12500 \times \dfrac{-2}{x^3} +0

C'' (x) = \dfrac{25000}{x^3}

where; x = 25

C'' (x) = \dfrac{25000}{25^3}

C''(x) = 1.6

Thus, at x = 25, C'' > 0

As such, to minimize the cost, the printer needs to make 25 metal plates.

4 0
3 years ago
Lorinda has 10 books on her bookshelf. 6 of these books have blue covers, and 4 have red covers.
crimeas [40]

Answer:

there is 60% chance it is blue and 50% its a fantasy one.

Step-by-step explanation:

6 out of 10 = 60%

3 out of 6 or 2 out of four is 50%

5 0
3 years ago
A man bought a horse and carriage for $500 paying three times as much for the carriage as for the horse how much did each cost
Lorico [155]
Hello! So, in order to solve this question, we should do 500/4. 500/4 = 125. Multiply 125 by 3 and you get 375. The horse costs $125 and the carriage costs $375.
8 0
3 years ago
Read 2 more answers
A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours. To test this claim,
natka813 [3]

Answer: C. 12.5

Step-by-step explanation:

Given : A manufacturer of new light bulbs claims the average lifetime of its long-life bulb is more than 4000 hours.

Population mean :  \mu=4000

Sample size : n= 100

Sample mean : \overline[x}=4500

Standard deviation: s=400

The value of test-statistic is given by :-

z=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}\\\\\Rightarrow\ z=\dfrac{4500-4000}{\dfrac{400}{\sqrt{100}}}\\\\\Rightarrow\ z= 12.5

Hence, the value of the test statistic for this problem is 12.5.

5 0
3 years ago
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