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jeyben [28]
4 years ago
10

7, 2x+2y= 16 2x + (y= 28

Mathematics
2 answers:
NikAS [45]4 years ago
8 0

Answer:

x = 20

y = -12

Step-by-step explanation:

2x + 2y = 16 -------eqn 1

2x + y = 28 ----------eqn 2

From eqn 2, let's make y the subject of the formula

2x + y = 28

y = 28 - 2x

Substitute the value of y into eqn 1

2x + 2y = 16

2x + 2(28 - 2x) = 16

2x + 56 - 4x = 16

Collect like terms

2x - 4x = 16 - 56

-2x = -40

- cancels -

2x = 40

Divide both sides by 2 to get the value of x

2x/ 2 = 40/ 2

x = 40/2

x = 20

Substitute the value of x = 20 into eqn 2

2x + y = 28

2 (20) + y = 28

40 + y = 28

y = 28 - 40

y = - 12

Therefore,

x = 20

y = -12

Hint, to prove this values, let's pick eqn 1

2x + 2y = 16

x = 20

y = -12

2 ( 20) + 2(-12)

40 - 24 = 16

So our values are correct

timofeeve [1]4 years ago
6 0

Answer:

its k haha

Step-by-step explanation:

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Answer:

vertical; x=25

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3 years ago
Read 2 more answers
What is the solution of log (2 t + 4) = log (14 minus 3 t)?<br> A. -18<br> B. -2<br> C. 2<br> D. 10
Sliva [168]
I think it’s b but I’m not 100% sure you might want a second opinion
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Citrus2011 [14]

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Step-by-step explanation:

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5 0
4 years ago
Which quadratic function is in standard<br> form?
vovikov84 [41]

Answer:

  h(x) = 2x² -8x -10

Step-by-step explanation:

In the US, a quadratic is in standard form when the terms are listed in order of decreasing degree.

In the UK, a quadratic is in standard form when it is written in vertex form.

__

<h3>US</h3>

The only function with terms in order of decreasing degree is ...

  h(x) = 2x² -8x -10

<h3>UK</h3>

All of the functions <em>except the last</em> are written in vertex form:

  • f(x) = (x +1)² +0 . . . . . . . . would usually be written f(x) = (x +1)²
  • y(x) = -(x -6)² +16
  • g(x) = -3(x -3)² +4

__

<em>Additional comment</em>

Since the question asks about <em>one</em> function, we assume it is from the perspective of the US understanding of <em>standard form</em>. The point here is that "standard form" may vary from one tradition to another. (The "standard form" for numerical values varies by tradition, as well.)

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