All categories

3 years ago

Which option do I choose?

Mathematics

1 answer:

garik1379 [7]3 years ago

5 0

Answer:

Does exist -- It only exists when the determinant does not equal zero.

Step-by-step explanation:

The inverse of a matrix is the transpose of the cofactor matrix, divided by the determinant. If the determinant is zero, the result of the division is undefined and the inverse does not exist.

For this matrix, the determinant is (-2)(18) -(9)(4) = -72. The inverse exists.

You might be interested in

What is the equation for ⊙A?

elixir [45]

Answer:

Circumference = 3.14 diameter C = 3.14(6) Answer: 18.84

Step-by-step explanation:

8 0

3 years ago

The midpoint of AB is M(3, 3). If the coordinates of A are (2, -1), what are the

Vika [28.1K]

Step-by-step explanation:

Hey there!!

It's so simple.

While finding the coordinates of any point if the midpoint is there it will be much easier. You must remember the midpoint formulae.

Let's simply work with it.

Here, A (2,-1) and midpoint M(3,3) are given.

Let another coordinate be B(x,y).

By midpoint formulae,

$midpoint(x.y) = \frac{x1 + x2}{2} ,\frac{y1 + y2}{2}$

Putting their values,

$m(3 , 3) = \frac{2 + x}{2} , \frac{ - 1 + y}{2}$

As they are equal, equating with their corresponding elements we get,

$3 = \frac{2 + x}{2}$

6= 2 + x

x = 6-2

Therefore, the value of a is 4.

Again,

$3 = \frac{ - 1 + y}{2}$

6 = -1 + y

Therefore, the value of y is 7.

Therefore, the coordinates are B (4,7)

Hope it helps....

7 0

3 years ago

Read 2 more answers

This is important please help I will give brainiest to people who get both

ahrayia [7]

Answer:

First question is A.

Second question is C.

Step-by-step explanation:

First question is correct because non-linear graphs look just like that.

Second question is correct because 2 variables cannot equal the same thing in a function.

7 0

3 years ago

Q # 9 please find the area

Rudik [331]

To solve this problem you must apply the formula for calculate the surface area of a circle, which is shown below:
SA=πir^2
where r is the radius of the circle
r=18 inches
By substituying values, you have that the surface area is:
SA=π(18 in)^2
SA=324π in^2
The answer is 324π in^2

6 0

4 years ago

Read 2 more answers

F(x) = x2 - 2x + 3 g(x) = x3 - x2 + 4x Find f(x) + g(x).

blagie [28]

Answer: x3+2x+3

Step-by-step explanation:

4 0

3 years ago