1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
VMariaS [17]
2 years ago
8

Which graph represents the solution set y > – x + 2?.

SAT
1 answer:
icang [17]2 years ago
3 0

Look at the graph

___________

You might be interested in
Which were british field marshal bernard montgomery contributions.
Scrat [10]

C. He defeated the Axis armies of Italy and Germany at El Alamein, Egypt.


D. He defeated the German army at the Battle of the Bulge.

7 0
3 years ago
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:

  1. 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)
  2. 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
  3. vR, vE: Speed ​​of the receiver and the sender respectively. Its unit of measure in the S.I. is the m/s
  4. ±, ∓:
  • 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:

  • brainly.com/question/17107808
  • brainly.com/question/14929897
6 0
2 years ago
Researchers are studying two different designs of computer keyboards
olga_2 [115]

There are several types of keboard designs and research is ongoing to improve their efficiency e,g  QWERTY, QWERTZ and AZERTY keyboards

<h3>Types of Keyboards</h3>

Bellow is an extended list of the various types of keyboards

  1. Qwerty Keyboards
  2. Wired Keyboards
  3. Numeric Keypads
  4. Ergonomic Keyboards
  5. Wireless Keyboards
  6. USB Keyboards
  7. Bluetooth Keyboards

Learn more about the types of keyboards here:

brainly.com/question/13380788

8 0
2 years ago
The graph shows the price of green tea compared to the amount supplied by producers. What does this graph suggest about green te
Usimov [2.4K]

The information which can be deduced from this graph on green tea are:

B. Green tea is inelastic in terms of supply.

E. The supply of green tea does not change sharply with the price.

<h3>What is supply?</h3>

Supply can be defined as the total quantity of goods or services that are demanded by consumers at a given period of time.

<h3>The types of supply.</h3>

In Economics, there are two main types of supply and these include:

  • Elastic supply
  • Inelastic supply

<h3>What is inelastic supply?</h3>

Inelastic supply is a situation that occurs when the quantity of goods or services that the producers are willing to produce, doesn't change as the price of goods or services increases.

Read more on supply here: brainly.com/question/11898489

3 0
2 years ago
What would you tell a friend who tells you, “I’m just not that interested in applying for scholarships. It sounds like so much w
CaHeK987 [17]

Answer: go for it you can do anything you put your mind to

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • When a person tries to cultivate new clients or expand business relationship it is called
    14·1 answer
  • What are the two types of reinforcers?
    11·1 answer
  • 48×82 in long division
    12·1 answer
  • A company ordered $400 worth of muffins. Bran muffins cost $2 each and blueberry muffins cost $4 each. If the company ordered tw
    13·1 answer
  • Need help on my SAT test ! Those are words to choose from
    14·1 answer
  • Can someone please edit this one paragraph that got a grade of 1 get a grade of 2????
    10·1 answer
  • What Social Problems Affect Today's Students?
    12·1 answer
  • La probabilidad de que un caballo viva 20 años es 2/3 y la de que una vaca viva 20 años es 3/5, ¿cuál es la probabilidad de que
    9·1 answer
  • Mikah invented and patented a new product which sells in local department stores. This is an example of _____ income. A. Capital
    10·1 answer
  • A car slows from 22 m/s to 3. 0 m/s at a constant rate of 2. 1 m/s2. How many seconds are required before the car is traveling a
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!