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natita [175]
2 years ago
15

Is the equation 8 + 4= -5 + 7 true false or open and why

Mathematics
2 answers:
zysi [14]2 years ago
4 0
This is false, because the equation is then 12=2, which is incorrect.

Hope this helps!

~ThePirc
slega [8]2 years ago
4 0
1. Solve
8 + 4 = -5 + 7
12 = 2

Obviously 12 doesn't equal 2 so the equation is false. Here are the definitions:
True: The equation is true. 
Example: 2 =2

False: The equation is false or not true. 
Example: -2 = 2

Open: The equation is true or false depending on what the variable is. 
Example: 2x = 2


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According to the Rational Root Theorem, Negative two-fifths is a potential rational root of which function?
Artemon [7]

Answer:

f(x) = 4x4 – 7x2 + x + 25 f(x) = 9x4

Step-by-step explanation:

Because it has to be this one

3 0
2 years ago
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What is the constant term of the quotient when 2x^3-3x^2 + 4x-2 is divided by x^2-x+2?
AlladinOne [14]

Answer:

  -1

Step-by-step explanation:

See the attachment for the polynomial long division. The constant in the quotient is -1.

_____

Here, there is a remainder of -x. If there were no remainder the constant in the quotient is the ratio of the constant in the dividend to the constant in the divisor: -2/2 = -1.

That could be a first guess in a "guess and check" solution approach.

<em>Guess</em>: first term of binomial quotient is (2x^3)/x^2 = 2x; last term of binomial quotient is -2/2 = -1. So, the quotient is guessed to be (2x -1).

<em>Check</em>: (2x -1)(x^2 -x +2) = 2x^3 -3x^2 +5x -2

Subtracting this from the actual dividend gives a remainder of -x. This has a lower degree than the divisor, so no further adjustment of the quotient is required.

6 0
3 years ago
Solve the system of linear equations. separate the x- and y- values with a coma. -8x=72-16y
serious [3.7K]
Let's use the "elimination by addition/subtraction" method to solve this system for x and y.

<span> -8x=72-16y             
4x=-92+16y        <= Mult. all 3 terms by 2:          8x = - 184 + 32y

Now combine the following, column by column:

</span><span> -8x=       72-16y
</span>8x = - 184 + 32y
-----------------------
   0 = -112 + 16y.  Solving for y, 16y = 112, and y = 7.

Now subst. 7 for y in either of the original equations and calculate x:

<span>4x=-92+16(7)   =>   4x = -92 + 112  =  20.  Then x = 5.

Solution is 5, -7   (or, better written) (5, - 7).</span>
8 0
3 years ago
Three to the power of negative two
Yanka [14]

Answer:

1/9

Step-by-step explanation:

3^-2 = 1/3^2

1/3^2 = 1/9

4 0
3 years ago
Write an expression to show 4 decreased by the sum of g and 5.
Anastasy [175]

Answer:4 - (g+5)

Step-by-step explanation:

3 0
3 years ago
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