Monday
May 25, 2015

Posts by Jai


Total # Posts: 1,849

algebra
9t^4 + 7t - 45 t^3 + 10t note that when combining terms with variables, we just add the numerical coefficient of the same variable (and exponent). here, we can only combine 7t and 10t. thus 9t^4 + 7t - 45 t^3 + 10t 9t^4 + 17t - 45 t^3 rearranging, 9t^4 - 45 t^3 + 17t hope this...
May 14, 2011

Math
first observe that you are 24 years older than your son. also, since we are required of the ages, we represent these unknown ages using variables: let x = your son's age let x+24 = your age note that when your son's age is x years, you are three times as old. therefore...
May 14, 2011

Applied Physics
equilibrium means that all forces acting on the object are balanced / cancel each other out. it can also mean that the object is not accelerating. thus, an object can be in equilibrium whether it is motion or not, as long as forces are balanced. since it's said that it ...
May 14, 2011

Chemistry
to get the heat released or absorbed, Q = mc(T2-T1) where m = mass of substance (units in g) c = specific heat capacity (units in J/g-K) T2 = final temperature T1 = initial temperature **note: if Q is (-), heat is released and if (+), heat is absorbed now we can only apply ...
May 14, 2011

Chemistry
to get the heat released or absorbed, Q = mc(T2-T1) where m = mass of substance (units in g) c = specific heat capacity (units in J/g-K) T2 = final temperature T1 = initial temperature **note: if Q is (-), heat is released and if (+), heat is absorbed for water c = 4.184 J/g-K...
May 14, 2011

Math
X(bar) = 10,000 M = 1,000 D = 500 C = 100 L = 50 X = 10 I = 1 thus XMMDCLXII is equal to 12,662 hope this helps~ :)
May 14, 2011

mensuration
recall that the area of rectangle is given by A = L*W where L is length and W is width. substituting, A = 20*12 = 240 m^2 (we'll use this later) since there is 2 m wide path, (and thus there is total of 4 m on both sides), 20 - 4 = 16 m 12 - 4 = 8 m getting the area of ...
May 14, 2011

physics
hello~ you can find answers on google. just type "why candle flame up" , there are links discussing this topic. i can't post links here that's why~ ^^;
May 13, 2011

Math- college
to get this, we just use ratio and proportion: let x = miles travelled with 24 gallons 22 miles : 1 gallon = x miles : 24 gallons therefore, 22/1 = x/24 x = 22*24 x = 528 miles hope this helps~ :)
May 13, 2011

Math- college
(a) to get this, we just divide 1148 by 13. type this in you calculator: 1148 / 13 the answer must be 88.308. since the number of bags can not be decimal, we only take the whole number, which 88 sand bags. (b) to get this, we multiply the number of bags used (which is 88) by ...
May 13, 2011

Math
first let's represent their weights using variables: let C = weight of one piece of cake let A = weight of one apple let H = weight of one cherry from the first statement, (1) 2C = A + H for the second statement, (2) A = 5H + C now we need to find how mach does cherries ...
May 13, 2011

Algebra 8th
do you mean "square root" for the "radical"? if so, 2[sqrt(8) + sqrt(5)] note that we cannot combine the radical terms since their radicands (term inside the radical sign) are not equal. but we can rewrite this as 2[2*sqrt(2) + sqrt(5)] 4*sqrt(2) + 2*sqrt(5...
May 13, 2011

Calculus
recall that the derivative of cos^-1 (x) or arccos (x) is -1/[sqrt(1-x^2)] * dx thus the derivative of cos^-1 (x^2) -(2x)/[sqrt(1 - x^4)] note that the 2x is the dx that came from the derivatice of the term inside the cos^-1, which is x^2. hope this helps~ :)
May 13, 2011

Math
to convert PERCENT to DECIMAL, we move 2 decimal places to the LEFT. thus for 0.06%, we move 2 decimal places, and it becomes: 0.0006 now we know the decimal, we can convert this to fraction. first we count the places to the right of decimal point. there are 4 decimal places (...
May 11, 2011

Geometry
recall that length of arc is given by s = r*theta where r = radius theta = angle in radians first we convert the given angle to radians: 20 * pi/180 = pi/9 = 0.349 rad substituting, s = 1*0.349 s = 0.349 s = 0.35 (nearest hundredth) hope this helps~ :)
May 11, 2011

physics
(a) the motion of the book is projectile, and uniformly accelerated motion. thus we use the formula, h = ho + vo*t - (1/2)*g*t^2 where h = final height ho = initial height vo,y = initial vertical velocity = vo*sin(theta) t = time g = acceleration due to gravity (9.8 m/s^2) ...
May 11, 2011

physics
..what do you want to solve?
May 11, 2011

math
note that 36/9 is also equal to 4. thus we look for fractions that is also equal to 4. the denominator of 4 is 1 (any number divided by 1 is itself). thus we only multiply the numerator and denominator by the same number to get an equivalent fraction. for instance, let's ...
May 11, 2011

math
do you mean x^(2-n) ? if so at x = 8, 8^(2-n) = 0 , we can rewrite this as (8^2)/(8^n) = 0 64/8^n = 0 note that this equation has no solution and only at n-> infinity, it will approach zero. also at x=-8, it has no solution. hope this helps~ :)
May 11, 2011

science
in physics, note that mass is different from weight. mass has units in kilograms, grams, etc., while weight has units of Newton. (Newton = kg*m/s^2) to determine weight, we use the formula W = m*g where m = mass (in kg) g = acceleration due to gravity = 9.8 m/s^2 substituting...
May 11, 2011

Physics(Please Help!!)
* means multiply or times / means divided by to solve, input this on your calculator: 77.18 x 9.81 x 5.83 / 4.37
May 9, 2011

geometry: volume of cone
recall that volume of cone is given by V = pi*(r^2)*h/3 where pi = 3.14 (constant) r = radius h = height if r becomes (1/2)r, V,new = pi*[(1/2)r]^2*h/3 V,new = 1/4[pi*(r^2)*h/3] V,new = (1/4)V thus multiplied by 1/4. hope this helps~ :)
May 9, 2011

math!!!!
you use the distance formula: d = sqrt[ (x2 - x1)^2 + (y2 - y1)^2 ] where (x1,y1) = first point (x2,y2) = second point hope this helps~ :)
May 9, 2011

math
for the first question, we just use ratio and proportion. let x = time it takes to travel 3 miles. 0.75 mi : 0.25 min = 3 mi : x min therefore, writing in fraction, 0.75/0.25 = 3/x cross-multiplying, 0.75x = 0.25*3 0.75x = 0.75 x = 1 minute for the second, we also use ratio ...
May 5, 2011

math
it's positive~ example for (+) answer: 7 - 3 = 4 **3 (the lesser integer) is being subtracted from 7 (greater integer) other examples, -3 - (-8) = 5 0 - (-2) = 2 2 - (-1) = 3 hope this helps~ :)
May 5, 2011

math
note that the next term has a numerator 3 greater than the previous and has denominator 4 greater than the previous. thus, if 4/3 is the first term, (4 + 3(n-1))/(3 + 4(n-1)) where n = nth term (if 1st, n=1, if 2nd, n=2, etc.) or simplifying, (3n + 1)/(4n - 1) hope this helps~ :)
May 5, 2011

Math
x = -1/4 - 5/8 first, we convert 1/4 to a fraction whose denominator is 8, so that we can combine the fractions. we can do this by multiplying both numerator and denominator by 2: 1*2 / 4*2 = 2/8 therefore, x = -(2/8) - 5/8 then we simply add the numerator and copy the ...
May 5, 2011

trig
(1/m)= (m-34)/(2m^2) we cross-multiply: 2m^2 = m(m-34) 2m^2 = m^2 - 34m m^2 + 34m = 0 m(m+34) = 0 m = 0 and m = -34 but note that m = 0 is extraneous since when substituted back to original, 1/0 = (0-34)/(2*0^2) and any number divided by zero is undefined. thus x = -34 only. ...
May 5, 2011

math
(1) -4 + 7log(x) = 10 7log(x) = 14 log(x) = 2 x = 10^2 = 100 (2) log(x+3) + log(x-2) = log 14 recall some laws of exponents. when we add two log terms with same base, we can combine them by multiplying the terms inside the log. thus, we can rewrite this as, log[(x+3)(x-2)] = ...
May 5, 2011

Algebra
yes, you got the right answer for simplifying it. 2/(x^2-16) + 3/(x^2 -2x-8) = 5x+16/(x-4)(x+4)(x+2) but the question says that if numerator is equal to 6, what is x? thus we equate the numerator to 6: 5x + 16 = 6 5x = 6-16 5x = -10 x = -2 hope this helps~ :)
May 5, 2011

math
yes~ :)
May 5, 2011

Quick Question
25s + 25 = -15s first, we transpose all terms containing the variable s to one side of the equation (in this problem, let's transpose them to the left side), and all other terms to the other side. thus, we transpose -15s to the left side. to transpose, we change its sign ...
May 4, 2011

Math
it's (x^11)*sqrt(x), because sqrt(x^23) sqrt(x*x^22) sqrt( x * (x^11)^2 ) then sqrt of (x^11)^2 is x^11, so we can take it out: x^11 * sqrt(x) hope this helps~ :)
May 4, 2011

precalc
domain = set of all possible values of x range = set of all possible values of y therefore, (1) y = sqrt(x-3) note that the term inside the sqrt can be zero but cannot be negative, for it will become imaginary. thus, Domain: x must be greater than or equal to 3. also, y can be...
May 4, 2011

physics
the energy needed to increase or decrease the temperature of a given substance is given by Q = mc(T2-T1) where Q = heat (in J or cal) m = mass (in g) c = specific heat capacity (in J/g*K or cal/g*K) T = temperature (in Kelvin) **change in temperature can have unit degree ...
May 4, 2011

Math
first, we factor the radicand (the term inside the radical sign or the squreroot): sqrt(27*b^11) sqrt[ (3*3*3) (b*b^10) ] then we separate the perfect squares: sqrt[ 3*(3^2) b*((b^5)^2) ] and we take the squarerrot of the perfect squres. the squareroot of 3^2 is 3, while (b^5...
May 4, 2011

MAth
they are the reciprocal of each other. *reciprocal = when you interchange the value of numerator and denominator hope this helps~ :)
May 4, 2011

algebra
substituting, A = (1/2)bh A = (1/2)(30)(30) A = 450 m^2 hope this helps~ :)
May 3, 2011

IPC
there was a typo. from the first paragraph, ...this only means that when two objects are in thermal equilibrium (or their temperature is the same/equal), NO heat is being transferred... and the rest is ok. :)
May 3, 2011

IPC
Zeroth Law of Thermodynamics = two objects in thermal equilibruim will have no net heat flow between them. **this only means that when two objects are in thermal equilibrium (or their temperature is the same/equal), heat is being transferred. this is a consequence of the ...
May 3, 2011

geometry
recall that the general equation of a circle is given by (x - h)^2 + (y - k)^2 = r^2 where the point (h,k) is the center of the circle, and r is the radius. thus in the given equation, (x + 4)^2 + (y – 9)^2 = 18 18 = r^2 therefore, r = sqrt(18) = 3*sqrt(2) and so the ...
May 3, 2011

IPC
the energy needed to increase or decrease the temperature of a given substance is given by Q = mc(T2-T1) where Q = heat (in J or cal) m = mass (in g) c = specific heat capacity (in J/g*K or cal/g*K) T = temperature (in Kelvin) **change in temperature can have unit degree ...
May 3, 2011

math
thousands
May 3, 2011

math
to round off, first you need to know the place of the digit you want to round off,, in the problem it's "to the nearest ten". then we look at the number to the right of tens digit if the number to the right of tens digit is: *greater than or equal to 5, you add 1...
May 3, 2011

algebra1
..then?
May 2, 2011

Chem5
recall that density is mass over volume, or d = m/V substituting, 1 = m / 4200 m = 4200 g H2O to get the mass of dioxin, we just multiply its percent mass: 4200 * 0.00052 = 2.184 g dioxin hope this helps~ :)
May 2, 2011

physical science
assuming the gas is ideal, we can use Charles' Law: V1/T1 = V2/T2 where V1 = initial volume V2 = final volume T1 = initial temperature (in Kelvin) T2 = final temperature (in Kelvin) we first convert the given temp to Kelvin: T1 = 30 + 273.15 = 303.15 K substituting, V1/T1...
May 2, 2011

calculus
yes. the substitution is correct: let u = x^(1/2) thus du = 1/[2(x^(1/2))] dx, or dx = 2(x^(1/2)) du, or dx = 2u du substituting these to original integral, integral of [e^x^(1/2) / x^(1/2)] dx integral of [(e^u) / u] * (2u) du the u's will cancel out: integral of [2*e^u] ...
May 2, 2011

algebra 1
3(2x-5) > x+15 6x - 15 > x + 15 combining similar terms, 6x - x > 15 + 15 5x > 30 x > 6 hope this helps~ :)
May 2, 2011

physics
assuming the air is ideal, we can use the formula, P1/T1 = P2/T2 where P1 = initial pressure P2 = final pressure T1 = initial temperature (in Kelvin) T2 = final temperature (in Kelvin) we first convert the given temp to Kelvin: T1 = 20 + 273.15 = 293.15 K T2 = 250 + 273.15 = ...
May 2, 2011

Math
(2/3)y = (-1/5)x to get the slope, we first transform this equation into slope-intercept form, y = mx + b where m = slope and b = y-intercept. note that the numerical coefficient of y (number before the variable y) in slope-intercept form is 1, thus to change the given ...
May 2, 2011

math
note that in elimination method, we first simplify/modify one (or both) the given equation until if we add the two given equation, one of the variables will cancel out. in the problem, we can obviously see that the 2y in the first equation will be cancelled out by the -2y of ...
May 2, 2011

math
..it's difficult to show long division here,, but the answer is 4 - 4x.
May 2, 2011

math
(3x + 3)(-4x^2 + 4x - 2) -12x^3 + 12x^2 - 6x - 12x^2 + 12x - 6 note that the 12x^2 and -12x^2 will cancel out, and we combine -6x and 12x: -12x^3 + 6x - 6 hope this helps~ :)
May 2, 2011

math
f(x) = x^2 – 18x + 81 f(x) = 16 substituting the value of f(x) to the quadratic equation, 16 = x^2 - 18x + 81 0 = x^2 - 18x + 81 - 16 0 = x^2 - 18x + 65 0 = (x-13)(x-5) thus, x = 13 and x = 5 hope this helps~ :)
May 2, 2011

math
*reposted* ..it's difficult to show long division here,, but the answer must be 4 - 4x.
May 2, 2011

Physical Science
i'll try my best to explain them as simple as possible. (i) distance - how far an object has moved. it is in units of length (meters, kilometers, etc) (ii) speed - distance traveled over certain time, or in formula, v = d/t where v = speed d = distance t = time it has ...
May 2, 2011

Calculus
x^2 / ln 3x getting the derivative, [(2x)(ln 3x) + (x^2)(1/(3x))(3)] / [(ln 3x)^2] simplifying, [ (2x)ln 3x + x ]/[(ln 3x)^2] hope this helps~ :)
April 30, 2011

Algebra
note that you cannot simplify the right side equation log3 (4) + log3 (y+8) , by 4 + y + 8 ... they should be multiplied. recall some laws of exponents; if we are add terms of the same base, for example log 3 + log 5 this simplifies to log(3*5) or log 15 going back to the ...
April 30, 2011

Algebra Unit Analysis
for #1, 1 mi = 1609.344 m since we need units in cubic meters, we raise both sides by 3: (1 mi)^3 = (1609.344 m)^3 1 mi^3 = 4168181825.44 m^3 for #2, we first convert the 58 ft into miles. we use ration and proportion (let n = unknown): 1 mi : 5280 ft = n mi : 58 ft thus 1/...
April 30, 2011

Mathematics
consecutive numbers are numbers which are next to each other. for example, 2 and 3 are consecutive. also, 5, 6, 7 and 8 are consecutive. for the first question, first, we represent the unknowns using variables. let x = first number let x+1 = second number note that the second ...
April 30, 2011

Math
from the first statement, it implies that Dominic is 8 years older than his sister. first we represent unknowns using variables: let x = sister's age let x+8 = Dominic's age since the sum of their ages is 56, x + (x + 8) = 56 then we solve for x: 2x + 8 = 56 2x = 48 x...
April 30, 2011

statistics
3.5 % increase means additional 0.035*10.85 to the his original salary. thus, 10.85 + 0.035*10.85 10.85 + 0.37975 11.23 dollars (rounded off) hope this helps~ :)
April 30, 2011

calculus
to do this, we get the derivative of (ax^2 - a^2)^4 + c assuming a is constant, the derivative is 4[(ax^2 - a^2)^3](2ax) hope this helps~ :)
April 30, 2011

calculus
to do this, we get the derivative of (ax^2 - a^2)^4 + c assuming a is constant, the derivative is 4[(ax^2 - a^2)^3](2ax) hope this helps~ :)
April 30, 2011

math
we use ratio and proportion: 1 : 2 1/2 = x : 1 thus, x = 1/(5/2) x = 2/5 of the lawn hope this helps~ :)
April 30, 2011

algebra
(1) 2x - 3y = 2 (2) x + 2y = -20 to solve this by substitution, we choose one of the equations. from there, we choose a variable and represent it in terms of the other variable. here, let's choose equation (2), and make variable x in terms of y: x + 2y = -20 x = -20 - 2y ...
April 29, 2011

math
to get unit price (the price per liter), we just divide it: 1.40/4 = ?
April 29, 2011

Algebra 2 review
when you place the ladder on the house, it forms a right triangle, where the length of ladder is the hypotenuse. recall Pythagorean theorem: c^2 = a^2 + b^2 where c = hypotenuse, and a and b are the legs substituting (letting a = 36), 39^2 = 36^2 + b^2 1521 = 1296 + b^2 1521...
April 28, 2011

Chemistry HELP!!
yes, we'll use the ideal gas law formula. PV = nRT rearranging and noting that n = mass/molar mass, n = PV/RT = m/MM m/MM = PV/RT we first convert the given pressure to atm, and temperature to Kelvin, and volume to L: P = 74.3 mm Hg * (1 atm / 760 mm Hg) = 0.0978 T = 20 + ...
April 28, 2011

Math
recall that the derivative of f(x)*g(x) is just f'(x)*g(x) + f(x)*g'(x) which means, we first take the derivative of the first function of x (the f(x)) then multiply this by the second function of x (the g(x)) and add this to the product of f(x) and derivative of g(x...
April 26, 2011

math
recall that speed is distance travelled per unit of time, or v = d/t substituting, 80 = 84.2 / t 80t = 84.2 t = 84.2/80 t = 1.0525 h hope this helps~ :)
April 26, 2011

Math
x^2 - x = -2 can be rewritten as x^2 - x + 2 = 0 observing, the given equation is not factorable, thus we use the quadratic equation: x = [-b +- sqrt(b^2 - 4ac)]/(2a) where a = numerical coefficient of x^2 b = numerical coefficient of x c = constant substituting, x = [ -(-1...
April 24, 2011

algebra 1
recall that the equation of a circle is given by (x-h)^2 + (y-k)^2 = r^2 where h = x-coordinate of center of circle k = y-coordinate of center of circle r = radius thus from the given equation, (x-2)^2 + (y+4)^2 = 9 the radius is sqrt(9) = 3 also, recall that area of circle is...
April 24, 2011

Math
36x^3 + 53x^2 + 38x + 35
April 24, 2011

geometry
recall that surface area of rectangular prism is given by SA = 2*(LW + LH + WH) where L = length W = width H = height substituting, SA = 2*[(8)(5) + (8)(2) + (5)(2)] SA = 2*(40 + 16 + 10) SA = 2*(66) SA = 132 in^2 hope this helps~ :)
April 18, 2011

Geometry
recall that the diagonal of a cube is given by d = sqrt(3*s^2) where s = length of side of cube substituting, d = sqrt(3*6^2) d = sqrt(108) d = 10.39 = 10.4 in hope this helps~ :)
April 16, 2011

Science
(1) True (2) False
April 16, 2011

Science
liquids and gases
April 16, 2011

chemistry
to get the number of He atoms, we dive the given mass to the mass of each He: 1.0 / (6.65 x 10^(-24)) = 1.50376 x 10^23 He atoms hope this helps~ :)
April 16, 2011

chemistry
first we write the chemical reaction: Al + HCl -> AlCl3 + H2 then we balance it: 2Al + 6HCl -> 2AlCl3 + 3H2 also we need to look for the masses of Al. from the periodic table, Al = 27 g/mol therefore, 54 g Al * (1 mol Al / 27 g Al) * (3 mol H2 / 2 mol Al) = 3 mol H2 or ...
April 16, 2011

chemistry
recall that molarity is just moles of solute per liter of solution, or M = n / V first we convert the 400 mL to L: 400 mL = 0.4 L substituting, M = 0.4 / 0.4 M = 1 M hope this helps~ :)
April 16, 2011

More Solutions Chem
first we balance the given chemical equation, thus: 2NaOH + H2SO4 -> Na2SO4 + 2H2O note that we need to balance a chemical equation because we need their stoichiometric coefficients (number before the chemical formula of a compound or element) to make ratios. since we are ...
April 15, 2011

Chemistry
first let's see if the chemical equation is balanced. Zn + HCl --> ZnCl2 + H2 since not yet balanced, then we balance it :P Zn + 2HCl --> ZnCl2 + H2 since we are given grams of Zinc, we need to find the mass of Zn from periodic table to convert it to moles. thus Zn...
April 15, 2011

algebra
*reposted* first note that we can't combine radicals if the radicands (term inside a radical sign) are not equal. notice that we can further simplify squareroot of 45 as sqrt(45) = sqrt(3*3*5) = sqrt(3^2 * 5) = 3*sqrt(5) now, we can combine them: 3*sqrt(5) + 4*sqrt(5) 7*...
April 15, 2011

algebra
first note that we can't combine radicals if the radicands (term inside a radical sign) are not equal. notice that we can further simplify squareroot of 45 as sqrt(45) = sqrt(3*3*5) = sqrt(3^2 * 5) = 3*sqrt(5) now, we can combine them: 3*sqrt(5) + 4*sqrt(5) 7*sqrt(5) hope ...
April 15, 2011

Chemistry
2C2H6 +7O2 --> 4CO2 + 6H2O since this is already a balanced equation, we can now use their stoich coefficients for the ratios. first, since we need grams of CO2, we find it's molecular mass. from the periodic table, the masses of C and O are C = 12 and O = 16 , thus 1*...
April 15, 2011

algebra
*reposted* first note that we can't combine radicals if the radicands (term inside a radical sign) are not equal. notice that we can further simplify squareroot of 45 as sqrt(45) = sqrt(3*3*5) = sqrt(3^2 * 5) = 3*sqrt(5) now, we can combine them: 3*sqrt(5) + 4*sqrt(5) 7*...
April 15, 2011

Algerbra
(x+2)(x+4) = 30 + x first we expand the left side of the equation,, multiplying them, x^2 + 2x + 4x + 8 = 30 + x then we combine similar terms and make the right side of equation equal to zero (since it's quadratic equation) : x^2 + 6x + 8 - 30 - x = 0 x^2 + 5x - 22 = 0 ...
April 15, 2011

help please
yes. if you're using MS Word, first highlight the text you want to double space, then right click and choose 'Paragraph' . you will see at the bottom right, 'Line Spacing' , and from there choose 'Double'. hope this helps~ :)
April 15, 2011

math
yes, it's linear equation in 3D. notice that e^2 + ln(2) looks complicated, but it's actually just a constant.
April 15, 2011

calculus
you're welcome~ :) by the way, i just want to make a correction. fro the value of V and SA, it's not 100, it should be 100*pi = 314.16 . sorry i forgot the pi, because i cancelled it right away, but the answers for r and h is still the same. i'll just retype the ...
April 15, 2011

calculus
sorry i haven't replied to your reply earlier. anyway, here's an example: there are many possible examples for this. but since we need to calculate volume (V) and surface area (SA), we choose a figure where its V and SA can easily/readily be calculated. for instance we...
April 15, 2011

calculus
yes :) do you want me to cite an example?
April 15, 2011

MATH PLEASE HELP!
or you can also make it 1 by dividing it by itself : 9-4.2) / (-4.2) = 1
April 15, 2011

MATH PLEASE HELP!
what do you mean "make -4.2 a one" ? is it something like you express -4.2 as sum of two number where one of them is 1 ?
April 15, 2011

math
distributive property~
April 15, 2011

algebra
first we represent the unknown using variable, let x = pounds of nuts needed then we set up equation. since we are given the number of pounds of raisins and its price per pound, we'll multiply it to get the total amount of the 12-lb raisins. we do the same for the the nuts...
April 15, 2011

Math
first we represent unknowns using variables, let x = the number of students asked then we set up the equation,, since the given were the fractional parts of the total number, we represent each part as (1/6)x : the number of students who like math (2/3)x : the number of ...
April 15, 2011

Math
first we represent unknowns using variables, let x = the number of students asked then we set up the equation,, since the given were the fractional parts of the total number, we represent each part as (1/6)x : the number of students who like math (2/3)x : the number of ...
April 15, 2011

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