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nikklg [1K]
3 years ago
13

Is (3,4) a solution to the system of equations. X + y = 7 x - 2y = - 5

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
8 0

Answer: Yes, the point (3,4) is a solution to the system.

===================================================

Proof of this:

Replace x with 3 and y with 4 in the first equation

x+y = 7

3+4 = 7

7 = 7

This confirms the first equation. Repeat for the second equation

x-2y = -5

3-2(4) = -5

3 - 8 = -5

-5 = -5

We get true equations for both when we plug in (x,y) = (3,4). This confirms it is a valid solution to the system of equations. It turns out it's the only solution to this system of equations. Visually, the two lines cross at the single location (3,4).

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3 years ago
What is the integers from 25 to 41
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5 0
3 years ago
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How do you write a quadratic equation in standard form?
Lemur [1.5K]

Answer:

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Step-by-step explanation:

For some constants a, b, and c, the standard form* is ...

  ax^2 + bx + c = 0

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It is nice if the leading coefficient (a) is positive, but that is not required.

The main ideas are that ...

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* This is the <em>standard form</em> for a quadratic. For other kinds of equations, when the expression is equal to zero, this would be called "general form."

3 0
3 years ago
53 - 21 + 62 + (25 ÷ 5)
Alisiya [41]

Answer:

48

Step-by-step explanation:

So your equation is: 5y3 - 21 + 6y2 + (25 ÷ 5) and y = 2.

Evaluate for y=2

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So the answer is 48.

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In a histogram, are the lengths of the rectangles proportional to the width of the bars?​
Orlov [11]

Answer:

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Hope this helps!

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3 years ago
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