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Agata [3.3K]
1 year ago
8

9. Given the following matrices, what is the correct product matrix AB?АBСD[12] [] 15.07opaDa

Mathematics
1 answer:
lesya692 [45]1 year ago
7 0

The product of A and B is:

\begin{bmatrix}1 & 2 \\ 3 & 4\end{bmatrix}\begin{bmatrix}-1 & 2 \\ 1 & 0\end{bmatrix}=\begin{bmatrix}1 & 2 \\ 1 & 6\end{bmatrix}

Therefore the answer is the third choice.

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Employees of a landscaping company built a retaining wall. They used brick to make the top 2/3 of the wall. The wall is 8and 1/2
IgorC [24]

Answer:

Height of the brick portion of the wall is 5.61 feet.

Step-by-step explanation:

Employees of the landscaping company used brick to build the top 2/3 of the wall. The total dimensions of the wall are 8 and 1/2 * 2 and 3/4 feet. So the height of the wall = 8 and 1/2 feet or in other words 8.75 feet.

Height of the brick portion of the wall = 2/3 * 8.5 = 0.66 * 8.5 = 5.61 feet

So the height of the brick portion of the wall is 5.61 feet.

Non brick portion of the wall is 8.5 - 5.61 = 2.89

4 0
3 years ago
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I’m confused?????????
QveST [7]

Answer:

The equation of the line is y - 3 = 2.5(x - 2) ⇒ D

Step-by-step explanation:

The rule of the slope of a line is m = \frac{y2-y1}{x2-x1} , where

  • (x1, y1) and (x2, y2) are two points on the line

The point-slope form of a line is y - y1 = m(x - x1), where

  • (x1, y1) is a point on the line

From the given figure

∵ The line passes through points (2, 3) and (0, -2)

∴ x1 = 2 and y1 = 3

∴ x2 = 0 and y2 = -2

→ Substitute them in the rule of the slope to find it

∵ m = \frac{-2-3}{0-2}=\frac{-5}{-2}=2.5

∴ m = 2.5

→ Substitute the values of m, x1, y1 in the form of the equation above

∵ m = 2.5, x1 = 2, y1 = 3

∵ y - 3 = 2.5(x - 2)

∴ The equation of the line is y - 3 = 2.5(x - 2)

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2 years ago
The sand falls at a rate of 60 cubic millimeters per second. How much time do you have to answer the question
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You Have -3 Seconds FAM 
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3 years ago
-2X² - 8.2 < 3.75 x 98X
Sav [38]

Answer:

x<585.55 is the answer mate

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2 years ago
How can ΔABC be mapped to ΔXYZ?
Arturiano [62]

Answer:

Step-by-step explanation:

Given are two triangles ABC and XYZ.

We have AB = XY = 25 cm, AC = YZ = 29 cm

and also angle A = angle X = 36 degrees

Thus we find that corresponding congruent sides are

AB and AC with angles A and X

To map ABC onto xyz,

Vertex B to Y, side AB to side XY with AC coinciding with XZ

Now all vertices x,y,z will perfectly match with transformed ABC

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