Is it me or does this problem not make sense? (you can't solve it)

5. Solve for x in the following system:
6x + 6y = -2
y = -x

I also need help in these:

38. We can take the product AB only if the number of columns of A equals the number of rows of B. -True?

40. The graph of the following system yields perpendicular lines:

x + 2y = -10
-4y = 2x + 20

True or False?

42. If we multiply a 2 x 2 matrix with a 2 x 1 matrix, the product is a 2 x 1 matrix.
-False?

Thanks
-MC

2 answers

There is no solution, the lines are parallel.

38. true

40. put each in slope intercept form:
y=-x/2 -5
y=-x/2 -5
false, it is the same line.
Wait, so 42 IS false?

-MC
Similar Questions
  1. The conventional problem-solving strategies usually taught have been:A. act out the problem, make a drawing or diagram, and
    1. answers icon 1 answer
  2. 7y^4+x^3y+x=4using implicit differentation, how do i solve this problem. it is a textbook example but the partwhere i "use the
    1. answers icon 6 answers
  3. Solve by the system of equations by substitution.x + 2y + z = 14 y = z + 1 x = -3z + 6 Anyone able to help me with this? I've
    1. answers icon 1 answer
  4. 1. What is the slope of the line perpendicular to y-6=-2x-4?2. Simplify 8 ^1/3. In case that doesn't make sense the problem is
    1. answers icon 2 answers
more similar questions