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3 years ago

Is the point (3,2) a solution for x > 4

Mathematics

1 answer:

mixer [17]3 years ago

6 0

Answer:

Step-by-step explanation:

Put the x-value into the inequality and see if it is true:

3 > 4 . . . . NOT TRUE

No, (3, 2) is not a solution for x > 4.

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Solve the system 2x+2y+z=-2 -x-2y+2z=-5 2x+4y+z=0

drek231 [11]

The values of (x,y,z) are (3,-1,-2) , if the given are equations $2x+2y+z=- 2$ , $-x-2y+2z=-5$ and $2x+4y+z=0$ .

Step-by-step explanation:

The given is,

$2x+2y+z=- 2$ .......................................(1)

$-x-2y+2z=-5$ ......................................(2)

$2x+4y+z=0$ .........................................(3)

Step:1

Equation (2) is multiplied by -1 ( Eqn(2) × -1 )

$x+2y-2z=5$ .............................(4)

Subtract the equation (1) and (4)

$2x+2y+z=- 2$

$x+2y-2z=5$

( - )

$(2x-x)+(2y-2y)+(z+2z)=(-2-5)$

$x+3z=-7$ ......................(5)

Step:2

Equation (2) is multiplied by -2 ( Eqn(2) × -2)

$2x+4y-4z=10$ ........................(6)

Subtract equation (6) and (3),

$2x+4y-4z=10$

$2x+4y+z=0$

( - )

$(2x-2x)+(4y-4y)+(-4z-z)= (10-0)$

$-5z=10$

$z = - \frac{10}{5}$

z = -2

From the equation (5),

$x+3z=-7$

$x+(3)(-2)=-7$

$x = -7+6$

x = -1

From equation (1),

$2x+2y+z=- 2$

Substitute x and z values,

$(2)(-1)+2y+(-2)=-2$

$2y - 4=2$

$2y=4-2$

$2y=2$

$y=\frac{2}{2}$

y = 1

Step:3

Check for solution,

$-x-2y+2z=-5$

Substitute x,y and z values,

$-(-1)-(2)(1)+(2)(-2)=-5$

$1-2-4=-5$

-5 = -5

Result:

The values of (x,y,z) are (3,-1,-2) , if the given are equations $2x+2y+z=- 2$ , $-x-2y+2z=-5$ and $2x+4y+z=0$ .

8 0

3 years ago

I NEED HELP, WILL GIVE U BRAINLIEST IF U GIVE ME ANSWER <3

lara [203]

Answer:

It would be the last choice. Base= 8 in; height= 3 in

Step-by-step explanation:

It gives you the measurement for the height you just have to read what the ruler says at the bottom. When does the shape stop on the ruler? That number would be the answer in this case it would be the last choice.

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3 years ago

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Ryan shaded 70 squares on his hundredths grid. Sarah shaded 80 squares on her hundredths grid.

Nuetrik [128]

Answer:

0.7

Step-by-step explanation:

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Solve the system by substitution. (x+3y=9 14.x - 2y = -6

Elina [12.6K]

Answer:

x=0 ,y=3

if you have any questions about the way I solved it,don't hesitate to ask

7 0

3 years ago

What is the prime factorization of 210

Kazeer [188]

Answer:

= 2*3 * 5 * 7

Step-by-step explanation:

210 = 21* 10

= 3*7 * 5*2

= 2*3 * 5 * 7

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3 years ago

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