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3 years ago

What is the unit rate for 875.52 kilometers in 38.4 hours The answer must be a decimal.

Mathematics

2 answers:

Leto [7]3 years ago

8 0

Your answer would be 22.8

This is because when you do 875.52 divided by 38.4, you get 22.8.

Hope This Helps!
:D

Artyom0805 [142]3 years ago

3 0

Hey there,

Answer:

Rate = Distance / Time
= 875.52km / 38.4 hrs
= 22.8km / hr

Hope this helps :D

~Top♥

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2 years ago

Question 8

sasho [114]

we are given

system of equations

First equation is

$3x-2y=31$

Second equation is

$3x+2y=-1$

now, we can find augmented matrix

$A=\begin{pmatrix}3&-2&31\\ 3&2&-1\end{pmatrix}$

now, we can change it into reduced row echelon form

step-1: multiply the 1st row by 1/3

$A=\begin{pmatrix}1&-2/3&31/3\\ 3&2&-1\end{pmatrix}$

step-2:add -3 times the 1st row to the 2nd row

$A=\begin{pmatrix}1&-2/3&31/3\\ 0&4&-32\end{pmatrix}$

step-3:multiply the 2nd row by 1/4

$A=\begin{pmatrix}1&-2/3&31/3\\ 0&1&-8\end{pmatrix}$

step-4: add 2/3 times the 2nd row to the 1st row

$A=\begin{pmatrix}1&0&5\\ 0&1&-8\end{pmatrix}$

so, we get

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3 years ago

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3 years ago