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TEA [102]
2 years ago
10

Find the determinant of the following matrix. [1 -2] [3 4]​

Mathematics
1 answer:
Andrew [12]2 years ago
8 0

Answer:

10

Step-by-step explanation:

[1 -2]

[3 4]

We can obtain the determinant of the above matrix by doing the following:

Determinant =(1 × 4) – (3 × –2)

Determinant = 4 – – 6

Determinant = 4 + 6

Determinant = 10

Thus, the determinant of the above matrix is 10

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Find the area.<br> 11 cm<br> 8 cm<br> 7 cm
HACTEHA [7]
66.5cm

Split the shape into a square and triangle and find the area separately

Square: 8*7=57
Triangle: 7*3/2 = 10.5
=66.5

7 0
3 years ago
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Que es un variable? (De matemáticas)
dsp73

Answer:

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6 0
2 years ago
brooke found the equation of the line passing through the points (-7,25) and (-4,13) in slope-intercept form as follows​
Goryan [66]

Answer:

The equation of the line passing through the points (-7,25) and (-4,13) in slope-intercept form is \mathbf{y=-4x-3}

Step-by-step explanation:

Equation of line passing through the points (-7,25) and (-4,13) in slope-intercept form.

The general equation of slope-intercept form is: y=mx+b

First we need to find slope

The formula used for finding slope is: Slope=\frac{y_2-y_1}{x_2-x_1}

We are given: x_1=-7, y_1=25, x_2=-4, y_2=13

Putting values in formula and finding slope

Slope=\frac{y_2-y_1}{x_2-x_1}\\Slope=\frac{13-25}{-4-(-7)}\\Slope=\frac{13-25}{-4+7}\\Slope=\frac{-12}{3}\\Slope=-4

So, slope m= -4

Now finding y-intercept

Using slope m=-4 and point (-7,25) we can find y-intercept

y=mx+b\\25=-4(-7)+b\\25=28+b\\b=25-28\\b=-3

So, y-intercept b =-3

Now, the equation of required line having slope m=-4 and  y-intercept b=-3 is:

y=mx+b\\y=-4x-3

So, the equation of the line passing through the points (-7,25) and (-4,13) in slope-intercept form is \mathbf{y=-4x-3}

3 0
2 years ago
it takes Renaldo 8 hours to make 7 carvings. how many many hours will it take him to make 63 carvings?
OLEGan [10]
It will take 72 hours to make 63 carvings
5 0
3 years ago
Guysss Pleaseee helppp​
Slav-nsk [51]

Answer:

600 cm^2

Step-by-step explanation:

The side length of one of the faces is 10 cm

The length of a side is generally noted as s.

In this problem s = 10

Area of a cube face = s^2

So the area of one face of a cube = s^2 = 10^2 = 10*10 = 100

There are 6 faces on a cube.

Area = 6 * 100 = 600

7 0
3 years ago
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