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koban [17]
4 years ago
9

Solve for b by elimination 2a+3b=12 5a-b=13

Mathematics
1 answer:
Dima020 [189]4 years ago
6 0

Answer: 2a+3b=12

               b=(12-2a)/3

5a-b=13

b= -13+5a

Step-by-step explanation:

1) 2a+3b=12

-2a        -2a

3b=12-2a

/3         /3

b= (12-2a)/3

2) 5a-b=13

   -5a     -5a

-b=13-5a    

*-1   *-1   -b= 13(-1)-5a(-1) *you'd multiply by -1 to cancel out the negative on b*

b= -13+5a

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What is the slope of the line that passes through the points (-4, -9) and (5, 3)
egoroff_w [7]

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4/3

Step-by-step explanation:

Moving from (-4, -9) to (5, 3), x (the 'run') increases by 9 from -4 to 5, and y (the 'rise') increases by 12 from -9 to +3.  Thus, the slope of the line connecting the two points is

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The given expressions for magnitude (M) can be solved for the intensity (I). Then the ratio of intensities is ...

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Answer:

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Step-by-step explanation:

We were given the slope formula;

m=\frac{y_2-y_1}{x_2-x_1}

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When x_2=x_1, then, the line passes through;

(x_1,y_1)  and (x_1,y_2)

The slope now become

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3 0
3 years ago
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