Algebra
posted by mysterychicken
Need help with these
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

Jackie
41. 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. 
mysterychicken
Thank you!
MC
Respond to this Question
Similar Questions

geometry is this right?
The question is a true and false. Two concurrent lines can never be perpendicular. Concurrent lines I thought were three or more lines that intersected at the same point. I think this is true because a perpendicular line has to intersect … 
MATH
Post your 50 or more word response to the following in the assignment link: How can you determine if two lines are perpendicular? 
Algebra II
1) There is a solution to x = (y5)^2 and x = (y 5 )^2 + 7 a) true b) false 2) There is no real solution to y = 1 and y = x^2 + 9 a) true b) false 3) the vertex of the graph of y = 3(x+ 9)^2 + 5 is a minimum value ? 
Algebra 2
Is it me or does this problem not make sense? 
Algebra
40. The graph of the following system yields perpendicular lines. x + 2y = 10 4y = 2x + 20 (True? 
Algebra
40. The graph of the following system yields perpendicular lines. x + 2y = 10 4y = 2x + 20 (True) 48. The graph of the following system yields parallel lines. x  2y = 1 y = 3x + 10 (False) Thanks MC 
math 8
Martin graphed the lines for a system of equations. His graph resulted in 2 lines with different slopes. Which of the following is true about this graph? 
health!
True or False. Washing your hands can help protect you from dangerous pathogens True True or False. People die from colds each year True True or False. Infectious diseases are caused by organisms or viruses that enter and multiply … 
Algebra
6. y = 2x  1 and y = x + 3 ***A. (4,7) B. (7, 4) C. (7, 4) D. infinite solutions 7. y = 4x and y + x = 5 A. (4, 1) B. (1, 4) C. (3, 2) ***D. (2,3) 8. What will the graph look like for a system of equations that has no solution? 
Math
Determine whether the statement is true or false. The lines with equation ax+by+c1=0 and bxay+c2=0, where a ≠ 0 and b≠ 0, are perpendicular to each other. ______________________________________________ True. The slopes …