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slamgirl [31]
3 years ago
5

If {4x-3y=17 and 2x-5y=-11 then y=?

Mathematics
1 answer:
anyanavicka [17]3 years ago
3 0
You need to solve this "system of linear equations."  In other words, find a point (x,y) that satisfies both 4x-3y=17 and 2x-5y=-11.

Try solution by elimination.  Multiply the 2nd equation by -2 to obtain -4x+5y=22.  Add this result to the 1st equation.  I'd suggest you write this out to see what is happening.  

 4x-3y=17

-4x+10y=22
----------------
        7y=39.  Solving for y, we get y=39/7 (a rather awkward fraction).

Now find x.  To do this, substitute 39/7 for y in either of the given equations.  Solve the resulting equation for x.

Write your solution in the form (x, y):  ( ? , 39/7).
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8 0
3 years ago
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meriva
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3 years ago
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victus00 [196]

Answer:

  1. Corresponding Angle Postulate
  2. Corresponding Angle Postulate
  3. Reflexive Property
  4. Similar

Step-by-step explanation:

The pairs of angles referenced in statements 1 and 2 are "corresponding" angles, so the Corresponding Angle Postulate applies.

The Reflexive Property is what says something is the same as itself. This is used in statement 3.

The upshot of the AA Similarity postulate is to say triangles are similar (as in statement 4).

7 0
2 years ago
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Black_prince [1.1K]

Answer:

$5.40

Step-by-step explanation:

The word <em>percent</em> literally means "for each 100," and we can use this vocab fact to help us answer a question like "what is 1.8 <em>percent </em>of $300?" We have 1.8 <em>for each 100</em> in 300, and since there are 3 hundreds in 300, that means we're going to be counting 3 1.8s, which gets us 1.8 × 3 = 5.4. Since our unit is <em>dollars</em> this comes out to $5.40.

8 0
3 years ago
Someonee pleasee help me with this!!!!The table below shows the land-speed records to the nearest mile per hour. Draw a scatter
Aloiza [94]
Answer: 221

Each year, it increases by 1 unit. 
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