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2 years ago

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What is the following quotient? startfraction startroot 6 endroot + startroot 11 endroot over startroot 5 endroot + startroot 3

endroot endfraction.

1 answer:

lilavasa [31]2 years ago

4 0

Answer:

its b

Explanation:

because i just took the test baddies

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If 15bx-20>35 where b is a positive constant which of the following best describes all possible values of 4-3bx

Anuta_ua [19.1K]

Quora Open This sounds like a multiple-choice test question from a standardized test. But let's take a look at it. If 15bx – 20 > 35 ,where b is a positive constant ... So you are given an equation here. Next you are given something to compare it to. 4 – 3bx. So we want to go from 15bx – 20 to 4 – 3bx. The point is for you to think about the relationship. What is the relationship of -20 to 4? How would you turn -20 into 4? By dividing by -5. Of course, division by a negative means you have to reverse the direction of the inequality. 15bx – 20 > 35 15bx – 20 35 -5 -5 4 – 3bx < -7. Note. You will be given an option with the incorrect inequality! After all, they want to see whether you remember every part of handling an inequality like this. Notice that we didn't have to solve for x. We didn't have to do a lot to the equation. We just had to do enough. That's why it is important to take your time to read the problem carefully and think about what it wants.

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3 years ago

Read 2 more answers

A bat emits a sound at a frequency of 3. 00 × 104 hz as it approaches a wall. The bat detects beats such that the frequency of t

OLga [1]

Taking into account the Doppler efect, the speed of the bat is closest to 5.02 $\frac{m}{s}$ .

The Doppler effect is defined as the apparent frequency change of a wave produced by the relative movement of the source with respect to its observer. In other words, this effect is the change in the perceived frequency of any wave motion when the sender and receiver, or observer, move relative to each other.

The following expression is considered the general case of the Doppler effect:

$f1=f\frac{v+-vR}{v+-vE}$

Where:

f1, f: Frequency perceived by the receiver and frequency emitted by the issuer respectively. Its unit of measurement in the International System (S.I.) is the hertz (Hz), which is the inverse unit of the second (1 Hz = 1 s⁻¹)
v: Velocity of propagation of the wave in the medium. It is constant and depends on the characteristics of the medium. In this case, the speed of sound in air is considered to be 340 m/s
vR, vE: Speed of the receiver and the sender respectively. Its unit of measure in the S.I. is the m/s
±, ∓:

We will use the + sign:

In the numerator if the receiver approaches the sender

In the denominator if the sender moves away from the receiver

We will use the sign -:

In the numerator if the receiver moves away from the emitter

In the denominator if the sender approaches the receiver

In this case, a bat emits a sound at a frequency of 3.00×10⁴ Hz= 30,000 Hz as it approaches a wall.

The bat detects beats such that the frequency of the echo is 900 hz higher than the frequency the bat is emitting.

So, you know:

f1= 30,000 Hz + 900 Hz= 30,900 Hz
f= 30,000 Hz
v= 340 m/s
vE=vR= vbat
Receiver approaches the sender

Replacing in the expression is considered the general case of the Doppler effect:

$30900 Hz=30000 Hz\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}$

Solving:

$\frac{30900 Hz}{30000 Hz} =\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}$

$1.03=\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}$

1.03×( 340 $\frac{m}{s}$ -vbat)= 340 $\frac{m}{s}$ + vbat

1.03×340 $\frac{m}{s}$ - 1.03×vbat= 340 $\frac{m}{s}$ + vbat

350.2 $\frac{m}{s}$ - 1.03×vbat= 340 $\frac{m}{s}$ + vbat

350.2 $\frac{m}{s}$ - 340 $\frac{m}{s}$ = vbat + 1.03×vbat

10.2 $\frac{m}{s}$ = 2.03×vbat

10.2 $\frac{m}{s}$ ÷ 2.03 = vbat

<u><em>5.02 </em></u> $\frac{m}{s}$ <u><em>= vbat</em></u>

In summary, the speed of the bat is closest to 5.02 $\frac{m}{s}$ .

Learn more about the Doppler effect:

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2 years ago

Which line from Extremely Loud and Incredibly Close reveals a melancholy tone?

son4ous [18]

Answer:

I wanted to tell her she shouldn't be playing Scrabble yet. Or looking in the mirror. Or turning the stereo any louder than what you needed just to hear it. It wasn't fair to Dad, and it wasn't fair to me.

Explanation:

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3 years ago

Which of the following conclusion can be drawn about hedy lamarr acting career

Zarrin [17]

The best option that gives a great conclusion about her acting career is Option C; Hedy Lamarr worked in America films with MGM Studios

<h3>What is the summary of his acting career?</h3>

Hedy Lamarr was a woman who had so many talents and was first known as a European film actress in the 1930s.

Hedy Lamarr began acting in American films with MGM Studios in the late 1930s and early 1940s. She did not have any formal training, but she did not allow that to stop her from teaching herself in her spare time which really helped her advance forward in the acting industry.

We can conclude that the best option that gives a great conclusion about her acting career is Option C.

The missing options are;

a. Hedy Lamarr wanted more opportunities to speak while acting

b. Hedy Lamarr was the first European actress of the 1930s

c. Hedy Lamarr worked in America films with MGM Studios

d. Hedy Lamarr was content with her contribution to film.

Read more about Acting career at; brainly.com/question/13426443

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6 0

2 years ago

Lesson 6 homework practice use the pythagorean theorem answer key

labwork [276]

Pythagorean theorem should be used to determine the length of any of the three sides of a right-angled triangle.

<h3>What is Pythagorean Theorem?</h3>

Pythagorean theorem can be defined as a fundamental mathematical equation in Euclidean geometry and it can be used to determine the length of any of the three (3) sides of a right-angled triangle.

Mathematically, Pythagorean's Theorem is given by this formula:

c² = a² + b²

<u>Where:</u>

c is the hypotenuse.

a is the adjacent side.

b is the opposite side.

<u>For example:</u>

c² = 3² + 4²

c² = 9 + 16

c² = 25

c = √25

c = 5 units.

Read more on Pythagorean Theorem here: brainly.com/question/16176867

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2 years ago