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erica [24]
3 years ago
15

What is rectilinear propagation??​

SAT
1 answer:
Crank3 years ago
4 0

Answer:

The first of the basic laws of geometric optics is the law of rectilinear propagation of light. It reads: in an optically homogeneous medium the ray of light propagates in a direction.

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What is one characteristic that indicates the first passage is fictional while the second is non-fictional?
netineya [11]

Answer:

D

Explanation:

Characters(Unless it says otherwise)  are all fictional, but the passage can present facts.

4 0
3 years ago
What does the author achieve by mixing exact and approximate numbers.
irina1246 [14]

Answer: do

Explanation:

8 0
2 years ago
What is one thing that you would say to your parents if you only had 5 minutes left till you die
Liono4ka [1.6K]

Answer:

i would say i love you to them and i want a biggest hug and kiss on a cheek

Explanation:

4 0
3 years ago
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For how many integers $n$ does the inequality $x^2 + nx + 15 < 0$ have no real solutions $x$?.
Rom4ik [11]

By making the determinant equal to or smaller than zero, we will see that there are 15 values of n such that the inequality has no real solution.

<h3>Solving the inequality:</h3>

Here we have the inequality:

x^2 + n*x + 15 < 0

We want to see for which values of n we don't have real solutions.

Now, we can write the quadratic equation:

y = x^2 + nx + 15.

If the determinant of this quadratic equation is negative or 0, then we have a single root or we don't have roots, and because the leading coefficient is positive, that would mean that the function never becomes negative. Then for these cases, the inequality has no real solutions.

Then we must have:

n^2 - 4*15*1  ≤ 0

Now we can solve this for n.

n^2 ≤ 60

Then if n^2  is smaller than 60, we don't have real solutions, and we know that:

√60 = 7.75

Then we have:

-7.75 ≤ n ≤ 7.75

But n can only be an integer, so we can write:

-7  ≤ n ≤ 7

From -7 to 7 there are 15 integers, then there are 15 values of n such that the inequality has no real solutions.

If you want to learn more about inequalities, you can read:

brainly.com/question/11234618

3 0
2 years ago
Which would most likely interact with an open flame and cause an accident?
hram777 [196]

Answer:

gas

Explanation:

Because if you mix gas and fire there will be an explosion

7 0
3 years ago
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