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3 years ago

HELP I NEED HELP ASAP

Mathematics

1 answer:

poizon [28]3 years ago

6 0

Answer:

I will tell D or C but I'm not sure :-\

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Will give 100 points and Brainliest! <br> Take a factor out of the sqaure root: √3y^2, where y<0

Anit [1.1K]

Answer:

The solution in the photo aobve I think that is true

Step-by-step explanation:

I hope that is useful for you :)

6 0

3 years ago

Which expression is equivalent to √-60? A) -2√15 B) -4√15 C) 4i√15 D) 2i√15

Novosadov [1.4K]

Answer:

d) 2i√15

Step-by-step explanation:

60/4 is 15 so you can take out the square of 2 and the -

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

A friend of yours claims to be able to ride a bicycle 20 feet per second, is this a reasonable

sp2606 [1]

Answer:

No and yes

Step-by-step explanation:

If the bike is at a sudden hault (A FULL STOP) its physically impossible for the sudden speed of his weight and laws of inertia to pull him forwar that quick.

NOW - if the bike is already in motion and going downhill the gravitational down force will haul his speed at 45MPH and would make him reach the lenght of 66feet per second.

5 0

3 years ago

Someone please help ASAP please..is dis correct?

sertanlavr [38]

Answer:

the average rate of change should be -10

Step-by-step explanation:

3 0

3 years ago