2) Does this mapping diagram represent a function? *
1 answer:
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Answer:
Option C
Step-by-step explanation:
- For the matrix A of order
to be invertible, its determinant must not be equal to zero, |A|
0,
exists if- AC = CA = I, where I is identity matrix.
- The homogeneous equation with coefficient matrix A has a unique solution:
AB = 0, B =
Thus, B = (0, 0, 0......., 0) is a unique solution
2. The non - homogeneous equation system with coefficient matrix A has a unique solution:
For an equation- AY = D
Y = is a unique solution
3. Every non homogeneous equation with coefficient matrix A is not consistent as:
For an equation- AY = D, has a solution.l Thus coefficient matrix is inconsistent whereas augmented matrix is.
4. Rank of matrix A = n, Thus the column space of A is
5. Since, column space of A = , thus x→xA is one-to-one
Answer:
Step-by-step explanation:
5 and 6 are the same, so I will do one of those and you can use the example to do the other one.
Slope-intercept form is y = mx + b. If we have 2 points and nothing else, we can use those 2 points in the slope formula to find the slope (the m value in the equation) and then plug that in with either one of the points to get the equation. The slope formula is:
Using our points in question 5: (2, 4) (5, 4)
So m = 0. Now pick a point and use it in the equation along with the m value to solve for b. I will use (2, 4):
4 = 0(2)+b and
4 = 0 + b so
b = 4.
Now we have m = 0 and b = 4 so we fill in the equation with that info:
y = 0x + 4 or simplifying,
y = 4
For question 7 they want the line parallel to y = 3x + 6 that goes through (-10, 2.5). For a line to be parallel to another line, their slopes have to be identical. The slope in y = 3x + 6 is 3. So the slope of the "new" line is going to be 3 as well. Now we will use that slope and the given point to solve for b, just like in #5:
2.5 = 3(-10) + b and
2.5 = -30 + b so
b = 32.5
Now we will fill in:
y = 3x + 32.5
For question 8 they want the line perpendicular to y = -4x - 2 that goes through (-16, -11). For a line to be perpendicular to another line, their slopes have to be opposite reciprocals. Opposite meaning the sign is opposite (positive becomes negative and negative becomes positive), and reciprocal meaning the fraction is flipped upside down. The slope in our line is -4. That means that the perpendicular slope is positive 1/4. Using that along with our point, we will again solve for b:
which simplifies to
-11 = -4 + b so
b = -7
Now we fill in:
For question 8, in order to find the line parallel to the given line, you need to know the slope. In the form it is currently in, we do not know the slope. We need to put it into slope-intercept form to find the slope, then we will proceeed as above. If
x + 4y = 6, then
4y = -x + 6 and, dividing by 4,
(The 3/2 is reduced from 6/4)
Now we can see the slope is -1/4. We use that along with the point (-8, 5) to solve for b:
which simplifies to
5 = 2 + b so
b = 3
Now we fill in, keeping in mind that lines are parallel when they have the exact same slope: