#### • Class 11 Physics Demo

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# how to show your work in division

Question:1. Convert -1/2 into decimal. Show your work using long division. 2. Plot the fractions in problem 1 on a number line. Can somebody explain me how to do it. Or just take other example please!!!

Answers:I can't show you with the division sign but you know what the long division sign looks like so the 2 is on the outside and the 1 is in the inside, 2 will not go into 1 so you need to put the decimal point after the 1 and add a zero, now on the top line of the long division you put the decimal point right above where you put it on the one, on the top line put a zero in front of the decimal point (to the left of it) because 2 will not go into 1 so it looks on the top line like 0. and now how many times does 2 go into 10 - 5 so your answer will be 0.5 which is the same as 1/2. So remember the bottom number (the denominator) goes on the outside of a long division problem, the top number (numerator) goes on the inside. Now I am just noticing, is it negative 1/2? then it would be a negative divided by a positive, it would stay negative. so on a number line I would use the boundaries of -2 to 2 but you could use other numbers, if it is -1/2 it would be between -2 and 1, right in the middle, if it is 1/2 it would be right in the middle between 1 and 2. Good luck! Hope you could understand what I was talking about.

Answers:1. C 2. C 3. C 4. C 5. C 6. C 7. C 8. C 9. C 10. C 11. C 12. C 13. C 14. C 15. C 16. C 17. C 18. C 19. C 20. 42,724,272

Question:Write the equation of a function with the x intercept of (-3,0) and a point at (2,10). Please show how you got this. Please write this in the standard form and then tell me how many solutions there are: (Show Work) y <= .5(x-1)^2 + 2 (<= means less than or equal to)

Answers:Use slope formula: m= (y2-y1)/(x2-x1) = (10-0)/(2-(-3)) = 10/(2+3)= 10/5 = 2 Then plug in that slope and (x1,y1) to this point slope form equation: (y-y1) = m(x-x1) (y-0) = 2(x-(-3)) y= 2(x+3) y= 2x+6 Ok..... y <= .5(x-1)^2 + 2 = .5(x^2 -2x +1) + 2= .5x^2 -x + (1/2) + 2 = .5x^2 - x + 2.5 Best answer right? :D

Question:Jane donates 2% of her annual salary to Charity and Sam donates 1% of his annual salary to Charity. The total of Jane and Sams donation is $620.If Jane makes$1000 more than Sam, how much is Janes annual salary ?

Answers:2/100 Jane + 1/100 Sam = 620 Jane = Sam + 1000 __________________________ 2Jane + Sam = 62000 2(Sam + 1000) + Sam = 62000 2 Sam + 2000 + Sam = 62000 3 Sam = 62000-2000 Sam = 60000/3 _________________________________ Sam makes $20000, Jane makes$21000 annualy.