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Katena32 [7]
3 years ago
15

PLEASE HELP 100 points and brainliest. y= 3x — 5 y=6x — 8 solve with elimination

Mathematics
1 answer:
makvit [3.9K]3 years ago
4 0
<h2><u>Let's solve for X using elimination</u></h2><h2>\boxed{\fcolorbox{y=3x-5}}</h2><h3>Step 1: Flip the equation around:</h3><h3>\boxed{\fcolorbox{3x-5=y}}</h3><h3>Step 2: Add 5 to either side</h3><h3>\boxed{\fcolorbox{3x-5+5=y+5\\}}    </h3><h3>\boxed{\fcolorbox{3x=y+5\\}}</h3><h3>Step 3: Divide both sides by 3.</h3><h3>\boxed{\fcolorbox{\frac{3x}{3}=\frac{y+5}{3}  \\}}</h3><h3>\boxed{\fcolorbox{x=\frac{1}{3}y+\frac{5}{3}  \\}}              </h3><h3 /><h3>Answer is: \boxed{\fcolorbox{x=\frac{1}{3}y+\frac{5}{3}  \\}}.</h3><h3></h3><h3 />

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Graph A.

Step-by-step explanation:

When x is equal to 0, why has to be equal to 2. The slope also has to be 3. To find this out, we do y2-y1/x2-x1. For A, the slope is -7--4/-3--2. This is equal to -3/-1. This is equal to 3. Because y=2 when x=0. option A is correct. For option D, when x=0, y=32. Therefore, this option is not correct. For option B, when x=0, y=2 so this could be correct. Plug it into y2-y1/x2-x1. This is equal to -1-0/-1-2. This is equal to -1/-3. 1/3 is not equal 3 so this option is not correct either. When x=0, y=32 for option C. Therefore, this option is not correct. Therefore, the answer is option A.

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6 0
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Read 2 more answers
The ratio of a number and 4 times that number is equal to the ratio of 5 times the number and 95 more than a number
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Answer:

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Step-by-step explanation:

If all the numbers referred to are the same number, we can use n to represent it. Then, "the ratio of a number and 4 times that number" is n/(4n) = 1/4. "The ratio of 5 times the number and 95 more than the number" is (5n)/(n+95)

The equation for the problem can be written ...

  1/4 = (5n)/(95+n)

___

If you're a purist, you might leave the factors of "a number" in the first raio and write it ...

  n/(4n) = (5n)/(95+n)

Solving this gets you to a quadratic form that has the extraneous solution n=0.

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