1. In a competitive examination, one mark is awarded for every correct answer while 1/4 mark is deducted for every wrong answer. A student answered 100 questions and got 80 marks. How many questions did he answer correctly? Solve using Cramer's rule. Let "x" and "y" be the number of questions answered correctly and incorrectly respectively.

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A: I just used the chain rule and product rule for derivatives

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Q: QUESTION 6 Solve the following boundary value problems a. y"+4y= 0, y(0)=-2, y (7) = 5 6 b. y"+3y=0,…

A: According to our guidelines we can answer only one question and rest can be reposted.

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Q: (b) Determine x(Cn, k), the number of k colourings of the cycle Cn with n vertices, for n> 3.

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Q: 9) If f(z)=u-iv is analytic in the z-plane, then the C-R equations satisfied by it's real and…

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Q: A O 5 B 15 D 11 19 16 18 10 Given the Venn diagram as shown above, answer each of the following…

A: Note: Hi! Thank you for the question, as per the honor code, we are allowed to answer three…

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