Which ordered pair is a solution of the equation 2x − y = 9?

Chicos ayudenme rápidito urgente plis es para ahorita al menos con algunos plis doy corona al que me ayuda pero porfavor ayudenm

Pani-rosa [81]

Bueno, usaré el español xD

11. Recordemos que entre más negativo es un número, menor es.

a) - 6 > - 10

ya que - 10 es más negativo, por consiguiente es menor, esto llega a confundir ya que tenemos la noción de que si vemos una cifra alta, por consiguiente es mayor, esto pasa en los positivos.

b) 12 > - 16

c) - 7 < 0

d) 35 > - 80

e) -37 < - 24

f) - 40 < 15

g) - 18 < 10

h) - 17 < 0

i) |-21| = |21|

El valor absoluto de un número negativo es su positivo, por lo que también puede ser:

21 = 21.

j) |176| > 0, o también 176 > 0

k) |-479| > |478|, o también 479 > 478

l) |-1375| = |1375|, o también 1375 = 1375

12. De menor a mayor.

a) - 8, - 7, - 4, 0, 3

b) - 16, - 12, - 7, 8, 9

c) - 15, - 13, 0, 9, 11

d) - 47, - 43, - 31, 14, 29

e) - 17, - 15, - 12, 16, 19

f) - 26, - 21, - 10, 17, 26

g) - 61, - 58, - 49, 30, 50

13. De mayor a menor.

a) 6, 4, - 1, - 5, - 7

b) 8, 0, - 7, - 11, - 13

c) 19, 6, - 8, - 10, - 17

d) 21, - 9, - 18, - 24, - 27

e) 53, 47, - 6, - 43, - 48

f) 14, 6, - 18, - 39, - 45

g) 24, 16, 12, - 12, - 17

Salu2

4 0

3 years ago

-3(3x+15)-(10+x) = 35 help me find x please

Reika [66]

X=-9. To do this equation you had to do a multi-step problem solver teqnique. But I would recommend Khan Academy for any questions. My best advice would be for that. Or you can just try to simplify the equation down as much as possible. To do so, you'd have to multiply the first parentheses by -3. Which would equal: (-9x+-65) -(10+x) =35. Next you will add 65 to each side. But always remember if you to something on this side, you must always do it on the other side over the equal sign. Which would equal to: -9-(10+x) =100. So from here you will subract 10 to eliminate the number 10. Like so: -9x+x=90. So from here, you will just add the two x's together because, in math simplifying in the most important thing ever!: -10x/10=90/10. (The parentheses mean division btw) Then after dividing you will get x=-9. Hope that helps and after getting this through your head it's a piece of cake. Good luck

3 0

3 years ago

Help PLEASEEEEEEEEEEEEEEEEE

dangina [55]

Answer:

B ; Point B

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Show that the equation x cubed + 8x = 30 has a solution between x = 2.2 and x =2.3 ?

tatuchka [14]

$x^3+8x=30\\
x^3+8x-30=0\\\\
2.2^3+8\cdot2.2-30=10.648+17.6-30=-1.752\\
2.3^3+8\cdot2.3-30=12.167+18.4-30=0.567
$

For $x=2.2$ the value of $x^3+8x-30$ is negative, and for $x=2.3$ the value is positive which means between $x=2.2$ and $x=2.3$ there is an x for which the value of $x^3+8x-30$ is equal to 0 and therefore there is a solution.

4 0

3 years ago

find zeros and y intercept and describe the end behavior in proper notation. then sketch the graph. 3x^3+2x^2-12x-8

Evgen [1.6K]

Answer: The zeros of the given equation are 2, -2 and -0.667. The y-intercept of the graph is f(0) = -8.

Explanation:

The given expression is,

$f(x)=3x^3+2x^2-12x-8$

To find zeros put f(x)=0

$3x^3+2x^2-12x-8=0$

This equation is satisfied by x=2, so (x-2) is the factor of the given equation. By synthetic division or long division we can find the remaining factor.

$(x-2)(3x^2+8x+4)=0$

Use Factoring method.

$(x-2)(3x^2+6x+2x+4)=0$

$(x-2)(3x(x+2)+2(x+2)=0$

$(x-2)(3x+2)(x+2)=0$

Equate each factor equal to zero by using zero product property.

So the zeros of the given equation are 2, -2 and -0.667.

To find the y-intercept of the graph, put x=0.

$f(0)=3(0)^3+2(0)^2-12(0)-8$

$f(0)=-8$

So the y-intercept of the graph is f(0) = -8.

Since the higher degree is 3 , which is odd and the coefficient of higher degree is positive, therefore the ead behavior is defined as,

$f(x)\rightarrow \infty \text{ as }\rightarrow \infty\\f(x)\rightarrow -\infty \text{ as }\rightarrow -\infty$

It means as x decreases unboundedly then the function decreases unboundedly. similarly x increases unboundedly then the function increases unboundedly.

5 0

4 years ago