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jek_recluse [69]

4 years ago

6

A plane is a set of ____ on a flat surface that extends forever

1 answer:

enot [183]4 years ago

6 0

Answer:

D.

Step-by-step explanation:

None of the above because I believe that it is <em>points</em>

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a 204 inch board is cut into two pieces. one piece is five times the length of the other.find the lengths of the two pieces

abruzzese [7]

Solution along with work is included in attachment.

5 0

4 years ago

Solve (-7)^2+5(5^2)-(20-10)

Andreyy89

Answer:

164

Step-by-step explanation:

(-7)^2 + 5 • 25 - 10

49 + 5 • 25 - 10

49 + 125 -10

164

8 0

3 years ago

israel started to solve a radical equation in this way: square root of x plus 6 − 4 = x square root of x plus 6 − 4 4 = x 4 squa

agasfer [191]

Lets solve our radical equation $\sqrt{x+6}-4=x$ step by step.

Step 1 add 4 to both sides of the equation:

$\sqrt{x+6} -4+4=x +4$

$\sqrt{x} +6=x+4$

Step 2 square both sides of the equation:

$\sqrt{x+6} =x+4$

$\sqrt{x+6}^2 =(x+4)^2$

$x+6=(x+4)^2$

Step 3 expand the binomial in the right hand side:

$x+6=x^2+8x+16$

Step 4 simplify the expression:

$0=x^2+8x-x+16-6$

$x^2+7x+10=0$

Step 5 factor the expression:

$(x+2)(x+5)=0$

Step 6 solve for each factor:

$x+2=0$ or $x+5=0$

$x=-2$ or $x=-5$

Now we are going to check both solutions in the original equation to prove if they are valid:

For $x=-2$

$\sqrt{x+6}-4=x$

$\sqrt{-2+6}-4=-2$

$\sqrt{4}-4=-2$

$2-4=-2$

$-2=-2$

The solution $x=2$ is a valid solution of the rational equation $\sqrt{x+6}-4=x$ .

For $x=-5$

$\sqrt{x+6}-4=x$

$\sqrt{-5+6}-4=-5$

$\sqrt{1}-4=-5$

$1-4=-5$

$-3\neq -5$

Since -3 is not equal to -5, the solution $x=-5$ is not a valid solution of the rational equation $\sqrt{x+6}-4=x$ ; therefore, $x=-5$ is an extraneous solution of the equation.

We can conclude that even all the algebraic procedures of Israel are correct, he did not check for extraneous solutions.

An extraneous solution of an equation is the solution that emerges from the algebraic process of solving the equation but is not a valid solution of the equation. Is worth pointing out that extraneous solutions are particularly frequent in rational equation.

8 0

3 years ago

28. Which category is zero NOT a part of?

Annette [7]

Answer:

Zero is not a natural number

Step-by-step explanation:

Hope this helps!

5 0

3 years ago

Read 2 more answers

ANSWER THIS PLEASE !!

nikklg [1K]

Answer:

B. point B

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers