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awarded  Popular Question
Aug
26
answered A carpenter used 1/9 of a box of nails…
Aug
25
answered Solving for $x$ in an exponential equation
Jul
31
comment Quadratic equation roots values was positive but shown as negative
if $a$ and $b$ are the roots of an equation then the equation can be written as $(x-a)(x-b)=0$, if you expand $(x-1/4)(x-4)$ you will get the original equation
Jul
21
awarded  Favorite Question
Jul
19
revised Expand the Logarithmic Expression.
latex added
Jul
18
comment Calculate sales price factoring cost of goods and taxes
sorry for the mistake, first you add % profit to your making cost and calculate % sales tax on it and add that too; if making cost is $100$ adding $32\% $ profit gives $132$, $1.5\%$ sales tax on $132$ is $1.98$, so your selling price should be $132 + 1.98 = 133.98$
Jul
13
comment Getting formula based on graph
very close to positive side of $y=\frac{100}{x}$
Jul
13
comment Is there any difference between 'all real numbers' and '$(-\infty, \infty)$'
+1 and I agree with Antonio
Jul
13
comment Calculate sales price factoring cost of goods and taxes
If $A$ is the selling price of each widget and $x$ is the making cost for each widget then $ ( A - 0.015 A) = 0.32 x $
Jul
11
revised Problems on solving an equation.
latex added
Jun
30
comment understanding how multiplying a number by itself and than using the result for division gives you a consistent result
since no paranthesis are used start from left to right, step (1) $1200 / 40 = 30$, step (2) $30 \times 40 = 1200 $
Jun
28
comment Advise me a book please
Higher Algebra by Hall and Knight and Coordinate Geometry by Loney , both available free at www.archive.org, for drawing graphs "Plotting Graphs" by Shilov at www.mirtitles.org
Jun
26
comment find coordinate on line at given distance from given coordinate
$5=\sqrt{(x+2)^2+(y+4)^2}\Rightarrow (x+2)^2+(y+4)^2=25$...(I); slope=$\frac{4+4}{3+2}=\frac{8}{5}$ ; $y=\frac{8}{5}x+c \Rightarrow -4=-(\frac{8}{5})2+c \Rightarrow -4+\frac{16}{5}=-\frac{4}{5}=c$ ; $\therefore y=\frac{8}{5}x-\frac{4}{5}\Rightarrow 5y=8x-4$...(II), solve (I) and (II), you will get two points
Jun
26
reviewed Approve find coordinate on line at given distance from given coordinate
Jun
26
comment Why do we switch the denominator and numerator when we divide fractions?
denominator's denominator is numerator
Jun
23
answered How to get the given equality?
Jun
23
comment what is first negative term of this series given series
I think it will be 6th term, because for the 6th term the coefficient $(n-1)(n-2)(n-3)(n-4)(n-5)$ will be negative as $\frac{13}{3}-5=\frac{13-15}{3}=\frac{-2}{3}$
Jun
21
comment Coordinate Geometry and Trigonometry book recommendation for GRE Math Subject Test
have a look at Coordinate Geometry by Loney and Trigonometry by Loney, both are classics, softcopy free available at archive.org, very cheap hardcopy available in India, both are used by students preparing for IIT entrance, very concise theory and large number of problems with answers.
Jun
19
comment Value of $\frac{1}{\log_aabc}+\frac{1}{\log_babc}+\frac{1}{\log_cabc}$
$y=\frac{\ln a}{\ln abc}+\frac{\ln b}{\ln abc}+\frac{\ln c}{\ln abc}$