What conditions on a matrix A ensure that Ax=b has a solution for all b in Rn? Select the best statement. (The best condition should work with any positive integer n.) A. The equation will have a solution for all b in Rn as long as the columns of A span Rn. B. The equation will have a solution for all b in Rn as long as the columns of A do not include the zero column. C. The equation will have a solution for all b in Rn as long as no column of A is a scalar multiple of another column. D. There is no easy test to determine if the equation will have a solution for all b in Rn. E. none of the above

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

1 and 2

step-by-step explanation:

the equation of the parallel line would be y = 2x + 9

step-by-step explanation:

to start we need to find the slope of the original line. we can do that by looking at the coefficient of x, which is 2

since the slope of the original line is 2 and parallel lines have the same slope, we know the new line will also have 2 slope. now we can use that along with the point given in point-slope form to get the find equation.

y - y1 = m(x - x1)

y - 5 = 2(x + 2)

y - 5 = 2x + 4

y = 2x + 9

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