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Alexxandr [17]
4 years ago
7

Plz help me with this math problem

Mathematics
1 answer:
Afina-wow [57]4 years ago
6 0

Answer:

what are the select options?

Step-by-step explanation:

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I will mark you brainliest!!!! Which ordered pair is the best approximation of the solution?
Ulleksa [173]

Answer:

D

Step-by-step explanation:

We can substitute y = 2x + 1 in the second equation

2x + 1 = -7x + 8

Add 7x to both sides

9x + 1 = 8

Subtact 1 from both sides

9x = 7

x = 7/9

Substituing x in the first equation

y = 14/9 + 1

x rounds to 0.8

y rounds to 2.5

 

5 0
3 years ago
What algebraic expression must be added to the sum of
user100 [1]

Answer:

We need to add the expression:  4x^2-16

Step-by-step explanation:

As the first step, add the first two polynomials listed in order to find what their sum is. Do such by combining like terms:

3x^2+4x+8\,+ (2x^2-6x+3) =5x^2-2x+11

now, you need to find another polynomial (let's call it P(x)) such that added to the one we just found above, will render 9x^2-2x-5 as a result.

Putting this phrase in mathematical terms, we write:

5x^2-2x+11\,+ P(x) = 9x^2-2x-5

Now we solve for this unknown P(x) in this equation, by subtracting each of the terms that are accompanying it on the left side of the equation. We do one at a time for clarity:

5x^2-2x+11\,+ P(x) = 9x^2-2x-5\\-2x+11+P(x)=9x^2-5x^2-2x-5\\-2x+11+P(x)=4x^2-2x-5\\11+P(x)=4x^2-2x+2x-5\\11+P(x)=4x^2-5\\P(x)=4x^2-5-11\\P(x)=4x^2-16

Therefore, the expression we need to add is: 4x^2-16

8 0
4 years ago
5 times a number is 14 less than the square of that number.Find the negative solution.
Over [174]

Answer:

The negative solution

-2

Step-by-step explanation:

Let the number be

Then 5 times the number is 5x.

14 less than the square of the number is

So our equation becomes

This implies that

We factor to get:

5 0
3 years ago
The ______ property of equality stated that if you divide both side by an equation by the same non cero number , the two sides w
sattari [20]

Answer:

division

Step-by-step explanation:

3 0
3 years ago
5x-6=3x-9 .......................................................................................
Vladimir79 [104]

Answer:

-3 / 2

Step-by-step explanation:

  1. 5x - 6 = 3x - 9
  2. 5x - 6 + 6 = 3 x - 9 + 6
  3. 5x = 3x - 3
  4. 5x - 3x = 3x - 3 - 3x
  5. 2x = - 3
  6. 2x / 2 = -3 / 2
  7. The X = -3 / 2
3 0
3 years ago
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