Question 20659

Q1) 0.75>-0.5+d

Ans  0.75+0.5 > -0.5 + d +0.5  ------------->(adding 0.5 on both sides)
     1.25 > d                  ------------->( -0.5 + 0.5 = 0)
     d < 1.25



Q2) x+4.9 is equal to or less than 0.45

Ans x+4.9 =< 0.45
    x+4.9 - 4.9 =< 0.45 - 4.9 -------->(Subtracting 4.9 from both sides)
    x =< - 4.45               


Q3) 3.35 is equal to or greater than -4.85+n
Ans 3.35 => -4.85 + n   
    3.35 + 4.85 => -4.85 +n +4.85------------->(adding 4.85 on both sides)
    8.2 => n
    n <= 8.2   

Q4) 2/5 > t- 7/10
Ans 2/5 + 7/10 > t - 7/10 + 7/10------------->(adding 7/10 on both sides)
    2/5 + 7/10 > t
    (2*10 + 7*5)/10 > t  ------------->(adding fractions)
    (20 + 35)/10 > t  
     55/10 > t
     11/2 > t  ------------>(simplifying fraction 55/10, 
                             Divide both numenator and demoninator by 5)
     t < 11/2
or   t < 5.5    


Kapil