# Questions on Algebra: Equations answered by real tutors!

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 Algebra: Equations Solvers Lessons Answers archive Quiz In Depth

 Question 423760: 16 + 8r - 4r + 4 = 24 Click here to see answer by jim_thompson5910(28598)

 Question 423895: Solve the system by elimination: 8x + 4y = 0 4x - 2y = 2 Click here to see answer by linht117(37)
 Question 423895: Solve the system by elimination: 8x + 4y = 0 4x - 2y = 2 Click here to see answer by MathLover1(6638)

 Question 423887: Solve for t. Show you process. c= (-2t + 4)/t Thank you! Click here to see answer by nerdybill(6962)

 Question 423890: (2x+5)/5 = (3x+1)/2 + (-x+7)/2 Solve equation and check solution. Thank you! Click here to see answer by linht117(37)

 Question 423889: A train leaves Kansas City, Kansas, and travels north at 85 km per hour. Another train leaves at the same time and travels south at 95 km per hour. How lnog will it take nefore they are 315 km apart? Show process. Thank you! Click here to see answer by rfer(12670)

 Question 423898: Let f(x)= -3x + 4 and g(x)= -x^2 + 4x + 1. Find the following: f(10) - g(10) Click here to see answer by jim_thompson5910(28598)

 Question 423897: Solve the system of equations: -3x + y - z = -10 -4x + 2y + 3z = -1 2x + 3y - 2z = -5 Click here to see answer by robertb(4012)

 Question 423888: How many liters of a 14% alcohol solution must be mixed with 20 L of a 50% solution to get a 30% solution? Show you process. Thank you!! Click here to see answer by dnanos(83)

 Question 424084: Find I if, p = \$250, r = 6%, t = 5 years Click here to see answer by mananth(12270)

 Question 424220: Find all numbers for which the rational expression is not defined. Separate by comma if needed. x^2-4/x^2+4x-21 Click here to see answer by stanbon(57387)

 Question 424397: *NO ONE EVER HELPS*! someone please help me with this problem: A formula for velocity is: v=√2as+u^2 Rearrange the above formula to make 'a' the subject. Thanks! Click here to see answer by Gersid(33)

 Question 424430: what is the algebraic equation for 3.5 times 7.8 when the #3, #5, #7 don't work on the calculator? Click here to see answer by richard1234(5390)

 Question 424652: x+y=22 x-y=8 solve by using the elimination method Click here to see answer by stanbon(57387)

 Question 424795: Help me solve the following: 1. d= 2h. So, h=? 2. Solve using the elimination method: 3r = 5s = -8 5r + 3s = 66 3. What is the y-intercept?: y + x = -8 Click here to see answer by linh117(31)

 Question 424814: Can you help me solve using the multiplication principle? what is the solution? -7/8x = -9/10 Click here to see answer by linh117(31)

 Question 424827: 1) Suppose that |a|≤ 2 and |b|≤3. a) What is the largest possible value of |a+b|? b) What is the largest possible value of |a+b| if a and b have opposite signs? Thank you for your help Click here to see answer by stanbon(57387)

 Question 424826: How do I solve? y - 1 > -20 Click here to see answer by 7984(3)

 Question 424831: In 1991, the life expectancy of males in a certain country was 66.1 years. In 1998, it was 68.5 years. Let E represent the life expectancy in year t and let t represent the number of years since 1991. the linear functin E (t) that fits the dat is: E (t) = __t +___. (round to the nearest tenth) Use the function to predict the life expectanc of males in 2008. E (17) = ____ (round to the nearest tenth) Click here to see answer by stanbon(57387)

 Question 424834: Is (-7, -9) a solution of 2x -4y =-6 Click here to see answer by stanbon(57387)

 Question 424905: trains A and B are travelling in the same direction on parellel tracks. train A is travelling at 60 miles per hour and train B is travellling at 80 miles per hour. Train A passes a station at 11:10 pm. If train B passes the same station at 11:25 pm, at what time will train B catch up to train A? Click here to see answer by mananth(12270)

 Question 424918: I'm confused. can you help me find the outputs for f(x)=3x^2 -4x? f(0) =? f (-1) =? f (2) = ? I understand that what inpute= goes into the () but, it's confusing. Click here to see answer by sudhanshu_kmr(1152)

 Question 424888: What are the values of the constant A in the equation 3(x+4)(x+A)=0 Click here to see answer by Gogonati(809)