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MissTica
3 years ago
11

Find the value of m .​

Mathematics
1 answer:
kondor19780726 [428]3 years ago
7 0

Step-by-step explanation:

if the 2 matrices are inverse, then their product must be the identity matrix

1 0

0 1

so,

m×3 + 2×-7 = 1

7×3 + 3×-7 = 0

m×-2 + 2×m = 0

7×-2 + 3×m = 1

that means we have to solve only

3m - 14 = 1

3m = 15

m = 5

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find an equation for the perpendicular bisector of the line segment whose endpoints are (-5,6) and (9,2)
svp [43]

Answer:

  7x -2y = 6

Step-by-step explanation:

The perpendicular bisector has a slope that is the opposite of the reciprocal of the slope of the segment between the two points. It must go through the midpoint of the segment.

The latter can be found by averaging the coordinates of the end points:

  ((-5, 6) +(9, 2))/2 = ((-5+9)/2, (6+2)/2) = (2, 4)

The difference in endpoint coordinates is ...

  (Δx, Δy) = (9-(-5), 2-6) = (14, -4)

For our purpose, we're only interested in the ratio of these values, so we can divide both by the common factor of 2:

  (Δx, Δy) = (7, -2)

A line perpendicular to this segment through the point (h, k) can be written as ...

  Δx·x +Δy·y = Δx·h +Δy·k

  7x -2y = 7(2) -2(4)

  7x -2y = 6 . . . . . . . standard form equation for the perpendicular bisector

7 0
4 years ago
Factor and Solve. Show work.
Naddik [55]

Step-by-step explanation:

1. We we can split 4p into 9p - 5p, and now we have 3p² + 9p - 5p - 15 = 0. We can take out 3p from the first 2 terms and -5 from the last 2 terms. This gets us 3p (p + 3) -5 (p + 3) = 0. These two terms have (p + 3) as a common facor, so we can take that out as well, which give us (p + 3)(3p - 5) = ). Using Zero Product Property, p + 3 = 0 and 3p - 5 = 0, and when we solve each equation, we get p = -3, p= 5/3.

2. We will use the same process.

6x² + 14x - 3x - 7 = 0

2x (3x+7) - 1 (3x+7) = 0

(3x + 7)(2x - 1) = 0

3x + 7 = 0, 2x - 1 = 0

x = -7/3, x=1/2

Hope this helps!

4 0
3 years ago
Which ordered pair is a solution of this equation? -6x + y = 35 Click on the correct answer. (-1,-7 (-6,-1) (-1,-6) (-7,-1)​
nikklg [1K]

Answer:

The ordered pair (-6, -1) is the only solution.

Step-by-step explanation:

-6x + y = 35

Let's plug in the points.

(-1, -7) --> -6(-1) - 7 = 6 - 7 = -1 which does not equal 35

(-6, -1) --> -6(-6) -1 = 35

(-1, -6) --> -6(-1) - 6 = 0 which does not equal 35

(-7, -1) --> -6(-7) - 1 = 41 which does not equal 35

8 0
3 years ago
There was 3,905 more hits on the school's website in January than February.February had 9,854 hits how many hits did the school'
seropon [69]
13,759 hits for both months

4 0
3 years ago
Read 2 more answers
M + n + p + q = 360, for n<br> solve equation for the indicated variable
Cloud [144]
90 I think so yeah.....
5 0
4 years ago
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