# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 71887: Solve the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent. x + 5y = 10 -2x - 10y = -20 Click here to see answer by psbhowmick(529)

 Question 71891: Given f(x) = 5x2  3x + 1, find f(2). Click here to see answer by tutorcecilia(2152)

 Question 71883: Solve each of the following systems by graphing 2x - y = 4 2x - y = 6 Click here to see answer by tutorcecilia(2152)

 Question 71929: I don't know where to start. Can you explain what I am meant to be doing to solve these two questions? a) 3x + 2y = 5 y = 5x - 17 b) 2x + 3y = 21 x - y = 18 Click here to see answer by stanbon(57967)

 Question 71895: Solve the system by graphing. x  y = 5 x + y = 3 Click here to see answer by checkley75(3666)

 Question 71881: Solve the following system by using either addition or substution. If a unique solution does not exist, state whethher the system is depent or inconsistent. 10x + 2y = 7 y = -5x + 3 Click here to see answer by elima(1433)

 Question 71882: Solve the following systems by substitution. 4x - 12y = 5 -x + 3y = -1 Click here to see answer by elima(1433)

 Question 72020: Which of the following equations is an example of a direct variation? y = 4x x = -4 x -2y = 7 y = 5/x Please show all work Thank you Click here to see answer by stanbon(57967)

 Question 72018: Solve the following system of equations using the substitution method: 4x - y = -6 x + 2y = 3 please show work Click here to see answer by elima(1433)

 Question 72021: Could someone please help me solve and show the work associated: Question 41 Solve the following expression when x = 4, and y = -3. 2(x-2y) Question 44 Find: - 8xy(4x2y + 7x - 6y2) - 12x2 - x2 - 8xy2 Click here to see answer by checkley75(3666)

 Question 72160: Two important reference points for temperature are the boiling point and the freezing point of water. water freezes at 0degreesC or 32degreesF. Water boils at 100degreesC or 212degreesF. Use this information to write an equation for the relationship between Fahrenheit degrees and Cecius degrees. Click here to see answer by stanbon(57967)

 Question 72177: 10-x+3x=2x-7+5x solving for the unknown not sure of the steps to solve this one because the varible is on both sides I was given this question and asked to write it down from the board Click here to see answer by stanbon(57967)

 Question 72233: Rationalize the denominator square root of 11 / square 0f 7 = Click here to see answer by jim_thompson5910(28715)

 Question 72235: Reduce to the lowest term if possible; state any restrictions on the variable (3x+15)/(3xsquared+ 24x+45) Click here to see answer by rmromero(383)

 Question 72238: Simplpfly square root of 2/ ( square root of 2 + square root of 5) Click here to see answer by jim_thompson5910(28715)

 Question 72188: eqautions and inequalities x^2  x  20 find the positive discriminant X^2  16x + 64 find zero discriminant 3x2 + 4x + 2 find negative discriminant 1) Value for : a=1, b= -1, c = 2)Calculation 3)Value of discriminant 4)What the value of the discriminant means to the graph explain what this means to the graph : y=ax^2 + bx + c Click here to see answer by rmromero(383)

 Question 72252: Factor by taking out the greastest common factor if possible 121y^4-11x^4 Click here to see answer by rmromero(383)

 Question 72251: ```find the principal root __ Ömē``` Click here to see answer by Edwin McCravy(8999)

 Question 72300: help with solving for I in E= IR I'm a bit of a novice in Algebra Click here to see answer by checkley75(3666)