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2 years ago

Which of these is an example of physical change?

1 answer:

8 0

a digesting bread because you're not changing anything about the you're just eating the bread and eating the bread has no change

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I need this answered plz!!!!!!!!!!!!!!!!!!!

Fynjy0 [20]

Answer:

Red: Left side equation

Blue: Right side equation

2x+7=2(x-1)

2x+7=2x-2

2x-2x=-2-7

0x=-9= 0 No solution

Step-by-step explanation:

Use Desmos graphing calculator if u need help with graphs

6 0

2 years ago

Help math look at pic

Sloan [31]

Answer: $\Large\boxed{(-4,~-3)~\text{and}~(-2,~1)}$

Step-by-step explanation:

Given the system of equation

$1)~y=-(x+2)^2+1$

$2)~y=2x+5$

Expand the parenthesis of the 1) equation

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

$y=-(x^2+4x+4)+1$

$y=-x^2-4x-4+1$

$y=-x^2-4x-3$

Current System

$1)~y=-x^2-4x-3$

$2)~y=2x+5$

Substitute the y value of the 1) equation with the 2) equation

$2x+5=-x^2-4x-3$

Add ( x² + 4x + 3) on both sides

$2x+5+(x^2+4x+3)=-x^2-4x-3+(x^2+4x+3)$

$2x+5+x^2+4x+3=0$

Combine like terms

$x^2+2x+4x+5+3=0$

$x^2+6x+8=0$

Factorize the quadratic equation

$(x+4)(x+2)=0$

$x=-4~\text{or}~x=-2$

Substitute the x values into one of the equations to find the y value

$y=2x+5$

$y=2(-4)+5=-8+5=-3$

$y=2(-2)+5=-4+5=1$

Therefore, the two solutions are:

$\Large\boxed{(-4,~-3)~\text{and}~(-2,~1)}$

Hope this helps!! :)

Please let me know if you have any questions

8 0

1 year ago

59 POINTS!!!! Show all work and circle your final answer for credit.

devlian [24]

Answer:

Exact Form:

$\frac{\sqrt{10} }{4}$

Decimal Form:

0.79056941

8 0

2 years ago

Is -2 a solution of the inequality -2x + 5 > 9? A. yes | B. no

kramer

Answer:B

Step-by-step explanation:

-2x+5>9

-2x>4

-x>2

x<-2

3 0

2 years ago

Find an nth-degree polynomial function n= 3; - 2 and 6 + 2 i are zeros; f(-1)= 53

Bas_tet [7]

Answer:

Find an nth-degree polynomial function.

Step-by-step explanation:

n= 3;

- 2 and 6 + 2 i are zeros;

f(-1)= 53

8 0

2 years ago