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Likurg_2 [28]
4 years ago
7

\begin{aligned} &2x+7y=1 \\\\ &y=4x -8 \end{aligned}

Mathematics
1 answer:
Lina20 [59]4 years ago
3 0

Answer:

Step-by-step explanation:

hello :

2x+7y=1 ...(*)

y=4x−8...(**)

(4;8) means x= 4 and y= 8

put this values in (*) and(**) :

2(4)+7(8) =1           62=1    false

8=4(4)-8          8=8   true

so :(4;8)  is not solution for this system.

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What is the domain of f(x)=(1)?
anyanavicka [17]

Answer: (0,0)

Step-by-step explanation: The domain of the expression is all real numbers except where the expression is undefines. In this case, there is no real number that makes the expression undefined.

Hope this helps you out. ☺

5 0
4 years ago
Given that f(x) = x2 + 6x – 2, g(x) = x – 7, and h(x) = x + 4 find each function. (g − f)(x)
Wewaii [24]

(g-f)(x) = -x^2-5x-5

Step-by-step explanation:

Given functions are:

f(x) = x^2+6x-2\\g(x) = x-7\\h(x) = x+4

The operations on functions can be performed just as they are performed on polynomials

So

(g-f)(x)=g(x)-f(x)\\=(x-7)-(x^2+6x-2)\\=x-7-x^2-6x+2\\

Combining like terms

=-x^2+x-6x-7+2\\=-x^2-5x-5

Hence,

(g-f)(x) = -x^2-5x-5

Keywords: Functions

Learn more about functions at:

  • brainly.com/question/2821386
  • brainly.com/question/2860697

#LearnwithBrainly

5 0
3 years ago
Find each angle or arc measure.
DerKrebs [107]

Since opposite angles of a cyclic quadrilateral are supplementary,

A= 180-101=79°

B= 180-68=112°

5 0
3 years ago
What is the surface area of the right cone below?
8_murik_8 [283]

<h2>\red{Solution} \blue \longrightarrow</h2>

Total surface area of cone is 176π

<h3>Explanation:</h3>

Surface area of curved surface of a cone is give by π⋅r.l , where r is the radius and l is the slant height of the cone.

Hence surface area of curved surface of a cone is π×8×14=112π .

As surface area of base is π×82=64π .

Hence total surface area is 112π+64π=176π

8 0
3 years ago
Unit 3 - Task 3 - (10 points)
Nuetrik [128]

The 50th term in the sequence is 199

Arithmetic sequence

The nth term of an arithmetic sequence is expressed as:

Tn = a+ (n - 1)d

where:

  • a is the first term
  • n is the number of terms
  • d is the common difference

The sequence formed by the amount of Whatchamacallits produced as;

3, 7, 11, 15...

a = 3

d = 11-7 = 7-3 = 4

Substitute

Tn = 3 + (n-1) * 4
Tn = 3 + 4n -4

Tn = 4n - 1

Hence the explicit formula that models the production for the nth term of the sequence is Tn = 4n - 1

If n = 50

T50 = 4(50) - 1

T50 = 199

Hence the 50th term in the sequence is 199

Learn more on sequence here; brainly.com/question/6561461

5 0
2 years ago
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