Tuesday

September 2, 2014

September 2, 2014

Posted by **mysterychicken** on Friday, May 6, 2011 at 1:39pm.

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

- Algebra -
**Jackie**, Friday, May 6, 2011 at 2:27pm41. False. If you solve both equations for "y", you will get the same line; which means they can not be perpendicular.

42. True. When you have two matrices multiplied together, (2 x 2)(2 x1). If the two inner numbers match, then your resulting matrix will be the two outer numbers.

- Algebra -
**mysterychicken**, Friday, May 6, 2011 at 2:30pmThank you!

-MC

**Answer this Question**

**Related Questions**

Algebra - 40. The graph of the following system yields perpendicular lines. x + ...

Algebra - 40. The graph of the following system yields perpendicular lines. x + ...

Algebra 2 - Is it me or does this problem not make sense? (you can't solve it) 5...

Algebra II - 1) There is a solution to x = -(y-5)^2 and x = (y -5 )^2 + 7 a) ...

geometry- is this right? - The question is a true and false. Two concurrent ...

math 8 - Martin graphed the lines for a system of equations. His graph resulted ...

MATH - Post your 50 or more word response to the following in the assignment ...

Math - 1.) Can a system of linear equations have exactly two solutions? A. True ...

algebra need by 10p cst - How can you determine if two lines are perpendicular? ...

9th grade math - Hey i need help on my math hw i just dont get it lol please ...