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x+5y= -3 3x-2y= 8 sovle using substituion

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  1. math

    x+5y= -3 3x-2y= 8 sovle using substituion
  2. Algebra PLEASE HELP

    Solve by substituion method 2r-5s=-12 5r+2s=57
  3. Algebra

    What is the answer to 7x+2y=16 and -21x-6y=24 using the substituion method?
  4. Algebra II

    Use direct substituion to evaluate the polynmial function for the given value of x f(x)=-3x^2+x^2-8x-2 f=2
  5. Calculus

    integral of 2sin^3xcosx dx that is a sin cubed x. i think i use u-substituion, but im not quite sure how to do it. please help and thank you!
  6. Math

    Can someone help me solve the following problems using the substituion method? I need to find the ordered pairs and I do not get it.... Here they are 1) 6m+n=47 m-4n=12 2) 6x+4y=-10 -7x+y=57 3) 5x+7y=43 -4x+y=25
  7. math (algerba 1)

    how would you sovle this? multiply: (a + 5) (a - 5)
  8. alg 2

    sovle for x: 4log33x=28. how do i do this....please help:(
  9. 8th grade

    sovle 7x + 12x -9 - 4x -3
  10. math

    how do i sovle this equation. x/5 = 12/15
  11. algebra

    Sovle by substitution: 2x-3y=9 4x-6y=-12
  12. Algebra

    sovle the compound inequality 8
  13. math

    sovle the following equation 8/x-1=9/(x)(x+2) i know the answer is -1,7 but how?
  14. Math Help

    Sovle w^2-13w+42=0 I get -6,-7 is this correct????
  15. math

    sovle the linear equation -8.3=x+6.1 Thank you
  16. Algebra

    1,Sovle using the substitution method. Show your work. If the system has no solution or an infinite number of solutions,state this. -x - 3y = -20 5x + 3y =40 2 Sovle using the elimination method. Show your work. If the system has no solution or an infinite
  17. math (algerba 1) Please help!

    x+y=0 3x+y=-4 Sovle each system of equation by graphing. If got the answer (-3,3), but it's not there. Please explain!
  18. Math

    Describe the sequence of transformations from quadrilateral ABCD to A'B'C'D A: -8,8 B: 8,-2 C: 4,-8 D: 4,-2 A': 2,-10 B': 8,-10 C': 2,-6 D: 8, -5 SOMEONE HELP ME SOVLE THIS PLEASE
  19. science and medicine

    I am having some trouble working this out . Could you possibily show me how to work it out.Thank You! A bicyclist rode into the country for 5 h. In returning, his speed was 5 mi/h faster and the trip took 4 hours. What was his speed each way? Could somone
  20. Algebra

    Sovle using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this -2x + 3y = -37.5 -4x + 0y = -24
  21. math

    Question: Find the given percent or fraction of the number. 14. 30% of 256 15. 25% of 2,048 16. 2/3 of 24 17. 5/6 of 90 How do i figure those out? I don't whant the answer I wanna know how to sovle them.
  22. very basic algebra

    I was told long ago way back when that when you have something like this -x = 7 you solve for x by doing the following (-x = 7)- x = -7 but now that I think about it your not actually multiplying by negative one what is actually happening is this right???
  23. Math

    Flying to the wind, an airplane takes 4 hours to go 960 km. The same plane flying with the wind takes only 3 hours to make the same trip. Find the speed of the plane and the speed of the wind. I wasn't here for the lesson from my teacher but told me to ask
  24. math

    sovle: (3x - 2y)^2 The answer is 9x^2 + 4y^2 - 12xy but I do not know how to get the 12xy part. 20 - 4/5x is greater that or equal to 16, then: The answer is x is less thatn or equal to 5 but again I do not know how to get this.
  25. probability

    A box contains 4 purple and 9 yellow balls.We take out 2 balls (with replacement). What is the probability of drawing a second ball yellow, if the first ball was purple? please sovle in details..thanks
  26. chemistry

    A + B -> C + D (reversible reaction) a 2L container contains 1 mol of C, 1.6 mol of D, 0.8 mol of A snd 0.8 mol of B. Calculate the equillibrium composition of the reaction. Kc =0.065 I think C and D are forming A and B because there is higher
  27. chemistry

    A + B -> C + D (reversible reaction) a 2L container contains 1 mol of C, 1.6 mol of D, 0.8 mol of A snd 0.8 mol of B. Calculate the equillibrium composition of the reaction. Kc =0.065 I think C and D are forming A and B because there is higher
  28. Algebra22222!!!

    Choose the ordered pair that is a solution to the system of equations. 3x - y = 10 -x + y = -4 (3, -7) (-1, 3) (3, -1) (3, 1) Follow the example I gave in your previous question. I'm not going to do all of them. You want to eliminate one of the variable
  29. algebra

    The equation D=1.2times square root h gives the distance, D, in miles a person can see to the horizon from a height, h, in feet. a. sovle for h. b. Long's Peak is 14,255 feet in elevation. How far can you see to the horizon for Long's Peak? Can you see
  30. Calculus

    so we are doing integrals and I have this question on my assignment and I can't seem to get it, because we have the trig substituion rules, but the number isn't even so its not a perfect square and I just cant get it, so any help would be greatly
  31. algebra

    he is missing 3 cents to buy an ice cream bar. she is missing 5 cents to buy the same ice cream bar. they combine their money but they are still 1 cent short. how much is the ice cream bar? Let x denote how much he has and y denote how much she has. Let p
  32. geometry

    Two similar polygons are shown. The side opposite to the base side of bigger polygon is labeled x. The adjacent side on the left of base is labeled 6. The adjacent angles on left and right vertices opposite to the base angles are labeled y minus 73 degrees