Solve by elimination: 3x+7y=23 -3x-7y=-17

Mathematics

1 answer:

Elanso [62]4 years ago

5 0

Answer:

there is no solution

Step-by-step explanation:

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This is equations and graph. Please answer correctly :(

miss Akunina [59]

1. y= -x + 3

2. y = x - 3

3. y = 3x + 1

4. y = -3x - 3

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3 years ago

How do you graph this ?

ANTONII [103]

Which one?
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The value of a car decreases by 20 percent per year. Mr.Sing purchases a 22,000 automobile.What is the value of the car at the e

Sloan [31]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Make a table of values and create a line of best fit

Anni [7]

<h2>Explanation:</h2><h2></h2>

Hello! remember you have to write complete questions in order to get good and exact answers. Here I'll explain this in a general way assuming the following table:

$\begin{array}{cc}x & y\\0 & 0\\1 & 2\\2 & 4\\3 & 6\\4 & 8\\5 & 10\end{array}$

As you can see, x increases in steps of 1 units. So let's check the difference in y:

$\bullet \ \text{From x=0 to x=1} \\ \\ \Delta y=2-0=2 \\ \\ \\ \bullet \ \text{From x=1 to x=2} \\ \\ \Delta y=4-2=2 \\ \\ \\ \bullet \ \text{From x=2 to x=3} \\ \\ \Delta y=6-4=2 \\ \\ \\ \bullet \ \text{From x=3 to x=4} \\ \\ \Delta y=8-6=2 \\ \\ \\ \bullet \ \text{From x=4 to x=5} \\ \\ \Delta y=10-8=2$

So we have a constant difference and we can conclude the table represents a line. Since the line passes through then y is directly proportional to x, so we can write:

$y=kx \\ \\ Where: \\ \\ k \ is \ constant \ of \ proportionality \ or \ the \ slope$