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2 years ago

Kayla why are you not c h a t i n g on ro blox

SAT

2 answers:

nlexa [21]2 years ago

7 0

Answer:drugs

Explanation:

only explanation is they are addicted to drugs

aalyn [17]2 years ago

5 0

You better c h a t kayla

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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

1 year ago

Number 2 please it so hard need help please

navik [9.2K]

Okay so Nancy wrote hers in expanded form is a method of representing a number through an addition statement by totaling the values of its digits.

8 0

2 years ago

How many electrons pass through a 20-ohms resistor in 10 min if there is a potential drop of 30 volts across it?

tangare [24]

The number of electrons passes through 20 ohms resistor in 10 minutes is 5.625e+21.

<h3>What is a resistor?</h3>

In an electronic circuit, a resistor is an electrical component that limits or regulates the flow of electrical current.

Given, the resistance is 20 ohms.

The potential difference is 30 volts

Time is 10 minute

By the formula of current

$\rm I = \dfrac{30}{20} = 1.5 \;C/s$

The charge flowing through the resistor is 1.5 C/s

1 electron charge is 1.6e+19

Now, the number of electrons passing through a 20 ohms resistor is

$\dfrac{1.5}{1.6e+ ^2^1} = 0.9375e+^1^9$

In 10 minutes

$0.9375e+^1^9 \times 60 \times 10 = 5.625e+^2^1$

Thus, the number of electrons passes through 20 ohms resistor in 10 minutes is 5.625e+21.

Learn more about a resistor

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1 year ago

Forms of money in the united states consist of paper money, coins, and _____.

fenix001 [56]

Answer: "checking account balances"

Explanation:

If you had the options:

bartering

minting

checking account balances

The option "checking account balances" is the answer to your problem. In simple terms, this is the "money you have in the bank."

<em>Learn more about your problem here: brainly.com/question/678565</em>

4 0

1 year ago

Read 2 more answers

What countries comprised the Triple Alliance? Great Britain, Russia, France Serbia, Austria-Hungary, Germany France, Germany, It

MArishka [77]

Hey, Can u give me a brainliest answer??

The countries are: Germany, Italy and Austria-Hungary

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2 years ago