# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 44518: Solve by completing the square: x2 + 6x + 4 = 0 Click here to see answer by jake_6233(74)

 Question 44514: Solve using the square root property: (x + 3)2 = 49 Click here to see answer by jake_6233(74)

 Question 44469: Rewrite the equation 2x – 3y = –6 as a function of x Click here to see answer by checkley71(8403)

 Question 44462: Write the equation of the line passing through (4, 4) and (4, 2). A) y = 4 B) y = –2x C) x = 4 D) y = x + 4 Click here to see answer by checkley71(8403)

 Question 44516: Solve by completing the square: x2 + 6x + 4 = 0 Click here to see answer by tutorcecilia(2152)

 Question 44463: Given f(x) = 5x2 – 3x + 1, find f(–2). A) 15 B) 27 C) –13 D) –25 Click here to see answer by Nate(3500)

 Question 44461: Find the y-intercept. –x + 3y = 15 A) (5, 0) B) (0, –15) C) (0, 5) D) (–15, 0) Click here to see answer by Nate(3500)

 Question 44446: Given f(x) = 5x2 – 3x + 1, find f(–2). Im getting -13 Am I correct? Click here to see answer by Nate(3500)

 Question 44555: Given f(x) = 5x2 – 3x + 1, find f(–2). A) 15 B) 27 C) –13 D) –25 Click here to see answer by stanbon(57261)

 Question 44556: Determine which two equations represent parallel lines. A) y = 5/3 x + 4 b) y = - 3/5 x - 7 c) y =2x+ 8 d) y=2x-4 A) (c) and (d) B) (a) and (b) C) (b) and (c) D) (a) and (d) Click here to see answer by stanbon(57261)

 Question 44553: Rewrite the equation 2x – 3y = –6 as a function of x Click here to see answer by stanbon(57261)

 Question 44429: Rewrite the equation 2x – 3y = –6 as a function of x isn't it f(x) = 2/3 + 6 Click here to see answer by checkley71(8403)

 Question 44578: Solve the following system of linear inequalities by graphing. 3x-y<2 x+y>2 Click here to see answer by josmiceli(9662)

 Question 44576: Angus invested \$18,000, part at 3% and part at 5%. If the total interest at the end of the year is \$660, how much did he invest at each rate? Click here to see answer by Nate(3500)

 Question 44573: Sally bought three chocolate bars and a pack of gum and paid \$1.75. Jake bought two chocolate bars and four packs of gum and paid \$2.00. Find the cost of chocolate bar and the cost of a pack of gum. Click here to see answer by Nate(3500)

 Question 44569: Bob invested \$20,000, part at 14% and part at 13%. If the total interest at the end of the year is \$2,720, how much did he invest at 14%? A). \$11,000 B). \$12,000 C). \$8,000 D). \$13,000 Click here to see answer by Nate(3500)

 Question 44603: I have this question below and only managed to solve part of it. In November 1998, the government announced in Parliament a \$10.5 billion package to help the country overcome the Asian economic crisis. If the \$10.5 billion is to be issued in \$2 notes, what will be the volume of all the \$2 notes, assuming that a \$2 note has a length of 13.3, a width of 6.4 cm and a thickness of 0.15 mm. Give your answer in m^2 (metre square). Volume = Length x Width x Height = 3.3 x 6.4 x 0.015 (since 1 mm = 0.1 cm thus 0.15 mm = 0.015 cm) = 1.2768 x 10 500 000 000 (1 billion = 1,000,000,000) = 13395900000 cm^3 = 13395.9 m^3 (since 1 m^3 = 1 000 000cm^3) Unfortunately, my teacher gave us the answer is 6 703.2 m^3. Please help. Thank you in anticipation. Click here to see answer by stanbon(57261)

 Question 44602: Good day, tutors! I've the following question but only managed to solve 2 parts of the three. It took two and a half years and 2.85 million m^3 of earth fill the disused of ABC quarry at Apple Road. a)If each truck can carry a maximum load of 6.25 m^3 of earth per trip, how many trips are needed to fill the entire quarry ? OK b)If the cost of transport, material and administration for each truck load is \$55, how much would it cost to fill the quarry ? OK c)The quarry site now provides an area of approximately 3 hectares for future development. Calculate the cost of one m^2 of the land. (1 hectare = 10 000 m^2) Please help to solve part (c) only. Thank you very much. Click here to see answer by stanbon(57261)

 Question 44567: Write the equation of the line passing through (3,-7),(-6,-7) Click here to see answer by checkley71(8403)

 Question 44551: complex fractions 9x^2 - 16y^2 over xy all over 3 over y - 4 over x Click here to see answer by gsmani_iyer(180)

 Question 44426: Determine which two equations represent parallel lines. I thought it was c&d but I was wrong. A) = 5/3 X +4 B) Y = - 3/5 X - 7 C) Y =2X+8 D) Y = 2X-4 Click here to see answer by pvaka(23)

 Question 44606: simplify the complex fraction 9^2-16^2y over xy all over 3 over x -4 over x Click here to see answer by gsmani_iyer(180)

 Question 44527: 9x^2-16y^2 over xy all over 3 over y-4 over x wouldn't xy be your common denominator? Click here to see answer by gsmani_iyer(180)

 Question 44456: complex fractions 9x^2-16y^2 over xy over 3 over y - 4 over x show work Click here to see answer by gsmani_iyer(180)

 Question 44568: Write the equation of the line that passes through point (-2,3) with a slope of -4. Click here to see answer by venugopalramana(3286)

 Question 44653: elimination method 2x/3 + 3y/4 =11/12 x/3 + 7y/18 =1/2 wouldn't 12 be the common denominator in the first equation help Click here to see answer by adamchapman(301)
 Question 44653: elimination method 2x/3 + 3y/4 =11/12 x/3 + 7y/18 =1/2 wouldn't 12 be the common denominator in the first equation help Click here to see answer by venugopalramana(3286)

 Question 44730: Can someone explain to me how to find the slope and y-intercept when you only have the value for x. Like x=5. I think that the slope would be undefined because this would be a vertical line, but would the y intercept be none? Click here to see answer by adamchapman(301)

 Question 44706: rewrite the wquation 4x-10y=11 as a function of x A) y=-2/5x+11/10 B) y=-2/5x+11 C) y=2/5x-11 D) y=2/5x-11/10 Click here to see answer by Nazareth(2)

 Question 44708: determine which two equations represent perpendicular lines A) y=5/3x-3 B) y=3x-5/3 C) y=-1/3x+5/3 D y=1/3x-5/3 Click here to see answer by fractalier(2101)

 Question 44701: Evaulate (-3) second power -17 A) 39 B) 24 C) 27 D)30 Click here to see answer by fractalier(2101)