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3 years ago

Which number sentence is true?

Mathematics

1 answer:

Vadim26 [7]3 years ago

5 0

Answer:

Step-by-step explanation:

BECAUSE THE ABSOLUTE VALUE CHANGE ANY NUMBER TO POSITIVE SO CERO IS EQUAL TO CERO.

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-28xy - ( - 4yz ) - ( - 4yx ) - 2zy =

ziro4ka [17]

Answer:

-24xy+2yz

hope it's helpful ❤❤❤❤❤❤

THANK YOU.

7 0

3 years ago

Write the system in a matrix equation. Then, find the determinant of the matrix containing the coefficients.

Shtirlitz [24]

Answer:

See below for the matrix

D = 100

Step-by-step explanation:

$\left[\begin{array}{cccc}3&2&1&-8\\-1&-2&4&7\\1&-6&-3&15\end{array}\right]$

3 2 1

D = -1 -2 4 = 3(-2)(-3) + 2(4)(1) + 1(-1)(-6)

1 -6 -3

- 1(-2)(1) - 3(4)(-6) - 2(-1)(-3)

= 18 + 8 + 6 + 2 + 72 - 6

= 100

Sorry, I can't type the vertical bars.

I hope this is what you are looking for.

5 0

3 years ago

Help me please!

telo118 [61]

Answer:

$f^{-1}(6) = 50$

Step-by-step explanation:

Given

$f(x) = \sqrt{2x} - 4$

Required

Find $f^{-1}(6)$

First, we calculate the inverse function

$f(x) = \sqrt{2x} - 4$

Express f(x) as y

$y = \sqrt{2x} - 4$

Swap the positions of x and y

$x = \sqrt{2y} - 4$

Solve for y: Add 4 to both sides

$4 + x = \sqrt{2y} - 4+4$

$4 + x = \sqrt{2y}$

Square both sides

$(4 + x)^2 = 2y$

Divide both sides by 2

$y = \frac{(4 + x)^2}{2}$

Express y as an inverse function

$f^{-1}(x) = \frac{(4 + x)^2}{2}$

Next, solve for: $f^{-1}(6)$

Substitute 6 for x

$f^{-1}(6) = \frac{(4 + 6)^2}{2}$

$f^{-1}(6) = \frac{(10)^2}{2}$

$f^{-1}(6) = \frac{100}{2}$

$f^{-1}(6) = 50$

7 0

3 years ago

Help pleaseeeeeeeeeeeee

Andru [333]

Answer:
5. 1:3
6. Joe
8. 2/3 = 8/12
9. 56/7 = 8/1

8 0

3 years ago

Pls help. I rly don't understand it.

yulyashka [42]

Answer:

You just need to demonstrate that the expression is not equivalent. To do that, we just need to evaluate the expression with a specific number.

$\frac{3}{8}x+2 \neq \frac{3}{2}x+5$

For $x=0$ , we have

$\frac{3}{8}(0)+2 \neq \frac{3}{2}(0)+5\\2 \neq 5$

Notice that the answer is true because 2 is not equivalent to 5.

Therefore, the expression is actually non-equivalent.

4 0

3 years ago