Questions on Algebra: Systems of equations that are not linear answered by real tutors!

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 Question 600959: Solve: x^2 + y^2 = 25 3x^2 + 3y^2 + x = 79 The correct answers are (4,3) and (4,-3), I can't figure out how to get them and I need to show my work. Please help me! Click here to see answer by Alan3354(34679)

 Question 601391: ASAP:plz What is the value of the y variable in the solution to the following system of equations? 5x + 3y = 7 3x - 5y = -23 Click here to see answer by lawdej(58)
 Question 601391: ASAP:plz What is the value of the y variable in the solution to the following system of equations? 5x + 3y = 7 3x - 5y = -23 Click here to see answer by w_parminder(53)

 Question 601376: | 3 1 -1 2 | | 0 0 -3 3 | | 9 5 0 1 | |-7 3 -2 0 | Evaluate. Click here to see answer by Edwin McCravy(9719)

 Question 601371: r = robbery f = forgery h = hijacking 3r + 5f + h = 29 3r + 2f + 2h = 33 3r + 2f + 3h = 43 How many years do you get for hijacking? Click here to see answer by ewatrrr(11176)

 Question 602316: Find the equation of the parabola ax^2 + bx + c = y which passes through the points (1,5), (2,12), and (4,44). This is what I hav so far: a(1)^2 + b(1) + c = 5 a(2)^2 + b(2) + c = 12 a(4)^2 + b(4) + c = 44 Click here to see answer by scott8148(6628)

 Question 602398: 0.07s + 0.04b + 0.08m = 790 0.06s + 0.04b + om = 140 -0.09s + ob + 0.08m = 550 S = stocks, b = bonds, and m = mortgages Question: How much did I put into eack investment? Click here to see answer by ewatrrr(11176)

 Question 602717: Hello there, I have an equation that I have worked the answer out for in my head but I cannot work out how to write the formula. Please could someone help me with the formula, Thank you. The equation is : Greg bats in 7 cricket matches, in the 8th match he makes 9 runs and his average decreases by one. How many runs has he made in all? Click here to see answer by ankor@dixie-net.com(16527)

 Question 600961: Find the equation of the parabola ax^2 + bx + c =y which passes through the points (1,5), (2,12), and (4,44). You don't have to solve it, just find the equation. Click here to see answer by ewatrrr(11176)

 Question 605796: a restaurant is open from 2pm to 2am each day, and a maximum of 200 patrons can fit inside. Let p(t) be the number of patrons in teh restaurant t hours after 2pm each day. What is a realistic domain for p(t)? Click here to see answer by solver91311(18785)

 Question 605998: hi, my name is kimberly and i am struggling on linear functions. i nee help on this problem 3x-4y=9 email: perez996@gmail.com Click here to see answer by Sarey(4)

 Question 607293: When solving a system of equations using Cramer's Rule, if Dx = 0, Dy = –1, Dz = 1, and D = 0, then what can you conclude? A. The system is dependent. B. The system is inconsistent. C. The system has one solution, (0, 0, 0). D. The system has one solution, (0, –1, 1). Click here to see answer by lynnlo(4174)

 Question 607402: I'f a dozen apples cost 2.35 how much will 8 apples cost Click here to see answer by rfer(13569)

 Question 607604: I need help solving these equations x-2y+3z=7 2x+y+5z=17 3x-4y-2z=1 Click here to see answer by Edwin McCravy(9719)

 Question 607702: 4x/(x+4)(x+2) find the domain, vertical and horizontal asymptoes and yand x intercepts Click here to see answer by Alan3354(34679)

 Question 607859: What is E(t) = 0.52t + 68.3 rounded to the nearest tenth? What is 74.54 rounded to the nearest tenth? Click here to see answer by jim_thompson5910(29613)

 Question 608423: How do I solve this quadratic equation, using elimination? x^2+y=8x+19 x^2-y=7x-11 The back of the book says that the answer is (-0.5,14.75) and (8,19) but I do not know how they got that. Click here to see answer by solver91311(18785)

 Question 608413: The sum of 2 numbers is 11. The cube of their sum exceeds the sum of their cubes by 792. Find the numbers. So far, I've got x+y=11 and x^3+y^3+792=11^3. I've tried using substitution, but the answer didn't exactly make any sense. I greatly appreciate the help. Click here to see answer by lynnlo(4174)

 Question 610085: a rectangular skating rink measuring 30 m by 20 m is to be doubled in area by adding a strip at one end and a strip of the same width along one side. find the width of the strips Click here to see answer by ankor@dixie-net.com(16527)

 Question 610320: Systems of equations can have what 3 types of answers with graphs that look how? Click here to see answer by jsmallt9(3438)

 Question 610938: 3x+10y=1 9x-2y=43 4x+3y=31 7x-10y=69 7x-6y=29 these r all different! Click here to see answer by solver91311(18785)

 Question 610968: Evaluate the polynomial when x=5 and y=-9. x^2-3y^2+2xy Click here to see answer by jim_thompson5910(29613)

 Question 611077: paul is 4 years younger than his brother. in 4 years, paul will be three-fourths as old as his brother. how old are they now? Click here to see answer by Maths68(1474)

 Question 611950: Find the points of intersection, if any, of the graphs in the system y^2+4x=0 x+y=0 Click here to see answer by htmentor(855)

 Question 612023: Can you solve the system of equations. x+2y=11 x=14-2y and then this one: 3x+y=5 2y-10=-6x Click here to see answer by Alan3354(34679)

 Question 612485: Suppose \$4000 is invested in an account paying 5% interest compounded annually (once a year). Write an equation to model the value of this investment. Find the balance in the account after 6 years. Round your answer to the nearest penny. Click here to see answer by ewatrrr(11176)

 Question 612772: How much water must be mixed with 4 pints of a solution that is 90% developer to produce a mixture that is 17% developer? Click here to see answer by stanbon(60778)