algebra 1

posted by .

I'm stuck on this problem. Can you help?
-4x-9y=1
-x + 2y =-4 WHat is x and y?

Two equations in two unknowns. Here is a quick way to solve them
-4x - 9y = 1
4x - 8y = 16
(I got that my multiplying both side so the secind equation that you provided by -4)
Now add the two equations:
-17y = 17
y = -1
Use that and any of the first equations to solve for x.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. secant line, tangent line

    f(x) = sqrt(x-1), 1<=x<=3 Let A = (a,f(a)), and B = (b,f(b)). Write an equation for 1. the secant line AB 2. a tangent line to f in the interval (a,b) that is parallel to AB Thank you for all the help. For the line, you have …
  2. help!

    Can you please give me one of them so I cansolve for the other one?
  3. Algebra1!!!

    1.Six pears and three apples cost $3.90. Two pears and five apples cost $3.30. How much does one pear cost?
  4. algebra

    how would i find an equation of a line that goes through points(1,6) and (3,10)?
  5. math

    how do i solve two step equations? Do you mean two equations in two unknowns?
  6. algebra

    A bicyclist rode into the country for 5hr. In returning her speed was 5 mi/h faster and the trip took 4 hr. what was her speed each way?
  7. Math

    Suppose you have two numbers. The difference of the two numbers is 12. The product of the two numbers is 17. Multiply the larger of the two numbers by 100, add 50 times the smaller number to that, round the total to the nearest whole …
  8. Algebra

    Wrtie an equation of a line passing through (6,10) and (6,-6 y= mx + b Put in the first set of points: 10=6m + b Do the same for the second point. Then, you have two equations, two unknowns. Solve by substitution.
  9. Math

    A glass is filled with water and the total weight is 220g. If the glass is halffilled with water, the total weight is 120g. What is the net weight of the glass?
  10. Physics

    You are given vectors A = 5.0i - 6.5j and B = -2.5i + 7.0j. A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 15.0. Find the x and y components to vector C. Here's the …

More Similar Questions