All categories

2 years ago

Will give you Brainliest

Mathematics

1 answer:

lora16 [44]2 years ago

7 0

I don't understand it. Explain more.

You might be interested in

HELP ME PLS

mina [271]

Age>8. I think ..............

7 0

2 years ago

Read 2 more answers

What would 9c-6+c be as an equivalent expression

pshichka [43]

-6+10c
I think, reorder the terms: -6+9c+c= -6+10c

8 0

2 years ago

Use a matrix to solve the system:

Romashka-Z-Leto [24]

Answer:

(2.83 , 1 , 4)

Step-by-step explanation:

$2x+2y-z=4\\4x-2y-2z=2\\3x+3y-4z=-4\\$

Rewrite these equations in matrix form

$\left[\begin{array}{ccc}2&2&-1\\4&-2&-2\\3&3&-4\end{array}\right] \left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\$

we can write it like this,

$AX=B\\X=A^{-1}B$

so to solve it we need to take the inverse of the 3 x 3 matrix A then multiply it by B.

We get the inverse of matrix A,

$A^{-1}=\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right] \\$

now multiply the matrix with B

$X=A^{-1}B\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}7/15&1/6&-1/5\\1/3&-1/6&0\\3/5&0&-2/5\end{array}\right]\left[\begin{array}{ccc}4\\2\\-4\end{array}\right] \\\\\\\left[\begin{array}{ccc}x\\y\\z\end{array}\right] =\left[\begin{array}{ccc}2.83\\1\\4\end{array}\right] \\$

4 0

2 years ago

- 16 to the power of -3/4

vekshin1

The answer to -16^-3/4 is -8

3 0

1 year ago

I need help can someone help me pls

sattari [20]

Answer:

D: 25 miles

Step-by-step explanation:

Pythagorean Theorem:

$a^{2} + b^2 = c^2$

36^2 + b^2 = 39^2

1,296 + b^2 = 1,521

b^2 = 225

b = 25

4 0

2 years ago