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3 years ago

How did cell phones change communications in the early 1990s?

Mathematics

2 answers:

qaws [65]3 years ago

8 0

Answer:

The 'explosion' of the mobile phone industry mean that people were no longer 'tied' to the office. They could now be contacted wherever they were.

Step-by-step explanation:

adell [148]3 years ago

7 0

Answer: Cell phones allowed people to be in constant contact (:

Step-by-step explanation:

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What is the x-value of the solution to the system of equations?

ValentinkaMS [17]

Answer:

The solution to the system of equations is:

$x=4,\:y=-3$

Step-by-step explanation:

Given the system of equations

$5x + 4y =8$

$2x- 3y = 17$

solving the system of equations

$\begin{bmatrix}5x+4y=8\\ 2x-3y=17\end{bmatrix}$

$\mathrm{Multiply\:}5x+4y=8\mathrm{\:by\:}2\:\mathrm{:}\:\quad \:10x+8y=16$

$\mathrm{Multiply\:}2x-3y=17\mathrm{\:by\:}5\:\mathrm{:}\:\quad \:10x-15y=85$

$\begin{bmatrix}10x+8y=16\\ 10x-15y=85\end{bmatrix}$

$10x-15y=85$

$-$

$\underline{10x+8y=16}$

$-23y=69$

$\begin{bmatrix}10x+8y=16\\ -23y=69\end{bmatrix}$

solve for y

$-23y=69$

Divide both sides by -23

$\frac{-23y}{-23}=\frac{69}{-23}$

$y=-3$

$\mathrm{For\:}10x+8y=16\mathrm{\:plug\:in\:}y=-3$

$10x+8\left(-3\right)=16$

$10x-24=16$

$10x=40$

Divide both sides by 10

$\frac{10x}{10}=\frac{40}{10}$

$x=4$

Thus, the solution to the system of equations is:

$x=4,\:y=-3$

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3 years ago

-1/4n - n= -5/6<br><br> What does n equal, Please I need this done very quickly!!

amid [387]

Answer:

n = 2/3

Step-by-step explanation:

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3 years ago

Wazi has sixty three 5 $ bills he takes the 5 $ bills to bank to exchange for 20$ how many 20$ bills does Wes I get

dmitriy555 [2]

15

63 x 5 = 315
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hence, 15 $20 bills

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3 years ago

If you talk for 140 minutes, determine what would be the monthly cost using the equation and your

Irina-Kira [14]

We need more detail to help with the problem.

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Predict what mass would be if the volume of the liquid was 32.0ml<br>Please help 10 points

Oksi-84 [34.3K]

Answer:

Around to 32grams

Step-by-step explanation:

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3 years ago