¿Cuáles de estas estrategias eliminan una variable en el sistema de ecuaciones?

−7x+2y=5
3x−5y=−5

a) Suma las ecuaciones.
b) Multiplica por 555 la primera ecuación, multiplica por 222 la segunda ecuación, luego suma las ecuaciones.
c) Multiplica por 333 la primera ecuación, multiplica por 777 la segunda ecuación, luego suma las ecuaciones.

Answer:

9/10 in fraction form 0.9 in decimal form

Step-by-step explanation:

Answer:

9/10

Step-by-step explanation:

keep change change, then multiply.

Answer:

-18

Step-by-step explanation:

2 x -2^3 + 3 x 2 x -1 - 4 x -1^2 = -18

Answer I think is 18

Step-by-step explanation:

The first part is 16, then the second part is 6, then the third part is 4. So then it would be 16+6-4=18, if I'm not mistaken.

Answer:

30,000

Step-by-step explanation:

Answer:

Step-by-step explanation:

One root is given, 10 - 4√7.

Since the polynomial has to have rational roots and of a minimal degree, the other root is the conjugate of the given and the polynomial is of degree 2 minimum.

The polynomial is:

Answer:

Step-by-step explanation:

4x^2+5x^2+x^2

Answer:

a I think ooookkkkk

The solution of the equation x/(x-1) + 2/(x+2) = -6/(x²+x-2) represented by statement is option D. The equation has one true solution and one extraneous solution.

To find the solutions to the equation, we need to simplify and solve for x:

x/(x-1) + 2/(x+2) = -6/(x²+x-2)

Factor the denominators on both sides of the equation.

The denominator on the left side can be factored as follows:

x² + x - 2 = (x+2)(x-1)

Find the common denominator.

The common denominator for the left side is (x-1)(x+2).

Rewrite the fractions with the common denominator:

[(x+2) × x]/[(x-1)(x+2)] + [2 × (x-1)]/[(x-1)(x+2)] = -6/[(x+2)(x-1)]

Combine the fractions,

[x(x+2) + 2(x-1)] / [(x-1)(x+2)] = -6/[(x+2)(x-1)]

Eliminate the denominator:

Multiply both sides by (x+2)(x-1) to eliminate the denominators:

[x(x+2) + 2(x-1)] = -6

Expand and simplify the equation:

x² + 2x + 2x - 2 = -6

x² + 4x - 2 = -6

x² + 4x + 4 = 0

Solve for x using the quadratic formula:

x = (-b ± √(b²-4ac)) / 2a

Here, a = 1, b = 4, and c = 4.

x = (-4 ± √(4² - 4 × 1 × 4)) / 2× 1

x = (-4 ± √(16 - 16)) / 2

x = (-4 ± √0) / 2

x = (-4 ± 0) / 2

x = -4 / 2

x = -2

The equation has one true solution, x = -2 (repeated root).

Now, let's check this solution in the original equation:

x/(x-1) + 2/(x+2) = -6/(x²+x-2)

(-2)/((-2)-1) + 2/((-2)+2) = -6/((-2)²+(-2)-2)

(-2)/(-3) + 2/0 = -6/(4-2-2)

2/0 is undefined, and since we cannot divide by zero, we have an extraneous solution.

Therefore, the correct statement  for the solution is option D. The equation has one true solution and one extraneous solution.

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Answer:

D. The expected height for someone with a femur length of 55 centimeters

Answer:

D

You avoid paying any interest and fees, this is the most obvious since you are trying to avoid debt and fees which will build up as you don't pay them

Answer:

f(-1)= -3

Step-by-step explanation:

We all know f(x) = y

Since x= -1, y= -3 as per given in the graph, so

f(-1)=-3

Answer:

a

63.75

I decided 85 by 2 to get what one Ince would be and then multiplied that number by 1.5

Answer:

B

Step-by-step explanation:

the amount of gas in tank changes over time (hours)

pls correct me if I'm wrong hope this helps

Answer:

HMmMm I think the answer is yes

Answer:

$14.22 is the interest rate

Answer:

[tex] - 1[/tex]

Step-by-step explanation:

[tex]\lim_{x\to 0} \frac{x + 2}{ x -2}[/tex]

[tex] = \frac{0 + 2}{ 0 -2}[/tex]

[tex] = \frac{2}{-2}[/tex]

[tex] = - 1[/tex]

Answer:

- 1

Ok? Understand?

........

Answer:

[tex]f(x) = x - 2 \\ g(x) = - 7x + 10 \\ f(g(x)) = ( - 7x + 10) - 2 \\ f(g(x)) = - 7x + 10 - 2 \\ f(g(x)) = - 7x + 8 \\ f(g(1)) = - 7(1) + 8 \\ f(g(1)) = - 7 + 8 \\ \boxed{f(g(1)) = 1}[/tex]

Answer:Rapid Loans Fast is the premier provider of cash advances, emergency and weekend loans. ... Thanks to the introduction of modern IT, the application for an online loan will take you no more than 5-10 minutes. Approval occurs automatically, after which the payday loans are instantly transferred to the borrower's bank card.

Step-by-step explanation:

Answer:

it should be 23 feet long

Step-by-step explanation:

Personally, I did this in a kinda weird way but I think that it should be correct

-How I figured the answer out-

I took 11g and wrote 80% next to it, because after all it has 80% less fat than the regular cookie.

Then, I scaled it down to 10% by dividing by 8, which got me

1.375g = 10%

And finally, I multiplied by 10 to now have 100% (meaning, a regular serving size cookie) and be left with the result: 13.75g

-The answer-

13.75g   (don't forget to write the units)

Have a great day :)

Answer:

Step-by-step explanation:

Add:

Subtract:

Answer:  [tex]\large \boldsymbol {\sf x^2+9 }[/tex]

Step-by-step explanation:

[tex]1) \\\\ \large \boldsymbol {} \sf 4x^2-2x+6 \\ + \\ \underline{2x^2+4x-1} \\\\6x^2+2x+5[/tex]          [tex]2) \\\\ \large \boldsymbol {} \sf 6x^2+2x+5 \\-\\ \underline{5x^2+2x-4} \\\\x^2+9[/tex]

Answer:

Give me branilest first you scammer

Step-by-step explanation:

Answer:

You reflect it, Translated and Rotate it

Step-by-step explanation:

hope this helps

Answer:

x > 3

Step-by-step explanation:

2(2x -3) >6

4x - 6 > 6( collect the like terms)

4x > 12(divide both sides by 4)

x > 3

PLS MARK BRAINLIEST

Answer:

Step-by-step explanation:

3000(1.042)^5= 3685.18970751

which rounds to 3685.19

Subtracting a negative becomes addition.

Both of the subtractions are subtracting a negative , so they both become addition.

Answer: D. 18 5/8 + 22 2/5 + 40 1/5

Answer:

Step-by-step explanation:

(9 + 33 - 6) ÷ 6 - 3²

             36 ÷ 6 - 3²   p

             36 ÷ 6 - 9    e

                     6 - 9    md

                         - 3   as

(10 + 43 - 5) ÷ 6 + 5²

              48 ÷ 6 + 5²    p

              48 ÷ 6 + 25   e

                       8 + 25  md

                             33  as

(6 + 3)² + (9 - 10 + 5)

       9² + 4     p

      81 + 4      e

      81 + 4      md not used

            85     as

4 x (12 x 6 - 4²) + 9        must use pemdas inside the parentheses first

4 x (12 x 6 - 16) + 9     e   (p not used inside)

     4 x (72 - 16) + 9    md

             4 x 56 + 9    as   parentheses complete, start over

                 224 + 9    md  (pe not used)

                       233    as

Vertex is (2,3), so that gives us:

    y=a(x-2)^2+3

Now the graph goes through (0,1), so plug that in to find a:

    1 = a(0-2)^2+3

  -2 = a(-2)^2

  -2 = a•4

 -1/2 = a

So, y = -1/2 (x-2)^2 + 3

Answer:

y = - ½(x - 2)² + 3

Step-by-step explanation:

Given the vetex, (2, 3), as the maximum point on the graph, along with the y-intercept, (0, 1):

We can substitute these values into the given vertex form of the quadratic equation:

y = a(x - h)² + k

where:

Use vertex = (2, 3) and y-intercept (0, 1) to solve for "a":

y = a(x - h)² + k

1 = a(0 - 2)² + 3

1 = a(-2)² + 3

1 = a(4) + 3

Subtract 3 from both sides:

1 - 3 = a(4) + 3 - 3

-2 = 4a

Divide both sides by 4 to solve for a:

-2/4 = 4a/4

- ½ = a

Therefore, the value of a = - ½. This means that the graph opens downward, and that the parabola is wider than the parent function.

The quadratic equation in vertex form given a = - ½, and vertex (2, 3) is:  

y = - ½(x - 2)² + 3

Please mark my answers as the Brainliest if you find this explanation helpful :)