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Find which value of k does the system of equations

x - 3y + z = -2

- x + 5y - z = 0

4x - 14y + kz = -5

have infinitely many solutions? For that particular value of k, solve the system of equations for x, y and z.

A solution with parameters may be entered as e.g.:[t,-9/2-6*t,3/2+3*t].

[k,x,y,z] = 

Please Help :) and explain in detail, thank you!

Write a program that asks user enter a sequence of 15 integers and then prints the number of times the user has entered an odd number immediately following an odd number. Arrays are not allowed to appear in your code.

A certain aqueous solution of sucrose at 25oC has a vapor pressure of 23.34 torr (a unit for pressure). The vapor pressure of water at 25oC is 23.76 torr. Find the activity of the solvent water in this sucrose solution. 

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What is the difference between AC (alternating current) and DC (direct current) in terms of their flow of electric charge?

Question 1. Design a DAC using inverting OPAMP for 3-bit binary value and verify the analog output for the same

Take: Rf=1MΩ

            R=1KΩ

            Vref= -5 V

A simple Zener voltage regulator is required to provide a steady regulated

output voltage of 10 V under a maximum load of 80 mA, while the input

voltage to the regulator varies between 12 V and 14 V.

17.1 Calculate the maximum rated current value of a Zener diode to be

used

17.2 Calculate the minimum power for the Zener that could be used

safely.

17.3 If a 5 W rated Zener were to be used in this circuit:

(i) Calculate the maximum rated current value of a Zener device

to be used

(ii) Calculate the range of possible RS. limiting resistor values.

(iii) Suggest a suitable standard E12 resistor value