What is a real image for Class 7?

Answers

Answer 1

In optics, an image is defined as the group of focus points of light rays coming from an object. A real image is a collection of focus points actually made by converging rays, while a virtual image is a collection of focus points made by extensions of diverging rays.

The real image is produced by the intersection of light rays. It can be obtained on a screen. Hence, projectors form real images.

The virtual image is formed when the light rays appear to be originating from a point but do not actually meet. It can be seen by human eyes.

Read more about the real image :

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Related Questions

Please help asap I will give you brainliest Find the area of the shaded region

Answers

Answer:

36

Step-by-step explanation:

Area of total region = 12 ×5

=60

Area of the small region = 8×3

=24

Area of shaded region = Area of Total region - area of small region

= 60 - 24

= 36

Dla każdej z liczb 20, 60, 150, 300, znajdź liczbę : a) o 10% większa, b) o 20% mniejszą, c) o 50% mniejsza,

Answers

Odpowiedź:

Prosimy sprawdzić wyjaśnienie

Wyjaśnienie krok po kroku:

Na numer: 20

a.) 10% więcej;

(1 + 10/100) * 20;

1,10 * 20 = 22

b.) 20% mniej

(1 - 20/100) * 20

0,8 * 20 = 16

c.) 50% mniej

(1 - 50/100) * 20

0,5 * 20 = 10

Dla numeru 60:

a.) 10% więcej;

(1 + 10/100) * 60;

1,10 * 60 = 66

b.) 20% mniej

(1 - 20/100) * 60

0,8 * 60 = 48

c.) 50% mniej

(1 - 50/100) * 60

0,5 * 60 = 30

Na numer 150;

a.) 10% więcej;

(1 + 10/100) * 150;

1,10 * 150 = 165

b.) 20% mniej

(1 - 20/100) * 150

0,8 * 150 = 120

c.) 50% mniej

(1 - 50/100) * 150

0,5 * 150 = 75

Dla numeru 300;

a.) 10% więcej;

(1 + 10/100) * 300;

1,10 * 300 = 33%

b.) 20% mniej

(1 - 20/100) * 300

0,8 * 300 = 240

c.) 50% mniej

(1 - 50/100) * 300

0,5 * 300 = 150

HELP PLS!!! make sure to submit a pic of the graph!
Graph the piecewise function.

Answers

Answer:

I cant graph on here

Step-by-step explanation:

Answer:

3x-5 if x≤-1    = Green

-2x+3 if -1<x<4   = Orange

2 if x≥4  = Purple

Three quarters of the cars in a parking garage are black, 4/7 of the remaining cars are blue, and the rest are silver. If there are 9 silver cars, how many cars are in the parking garage? * 1 point

Answers

Answer:

84 cars

Step-by-step explanation:

Given that 3/4 of the cars in a parking garage are black, let the number of cars in the garage be T, then

number of black cars = 3T/4, other = T - 3T/4 = T/4

If 4/7 of the remaining cars are blue then

the number of blue cars = 4/7 * T/4 = T/7

Remaining cars = T/4 - T/7

= (7T-4T)/28

=3T/28

Given that the remaining cars are sliver and the number of silver cars is 9 then

3T/28 = 9

Cross multiply

3T = 28 * 9

Divide both sides by 3

T = 28 * 9 / 3

= 28 * 3

= 84 Car

Find the area of each composite figure.

Answers

Answer:

89.14 Sq . meter

Step-by-step explanation:

Divide the figure into a semicircle with diameter 8 m and the remaining into a rectangle . The area of rectangle :

4 metres × 16 metres

= 64 sq. meter

Area of semicircle :

(pi×r^2)/2

= {(22/7)× (8/2)^2}/2

= (22×4×4)/(7×2)

= 176/7

= 25.14 sq. meter

Now , area of whole figure= (64+25.14)sq. meter

= 89.14 sq. meter

SOMEONE PLEASE ANSWER THIS CORRECTLY AND SHOW HOW THE EQUATION WOULD LOOK LIKE!!!!!!! PLEASE HELP ASAPPPPPPPPP!!!!!!!!!!!!!

Answers

Answer:

The answer is C

Step-by-step explanation:

The plumber works $90 per hour and has earned a total of $955, to find the number of hours he worked, you divide the total amount of money by the amount of money he earned every hour. Which would be [tex]\frac{955}{90}[/tex] = H or 90H = 955.

5) 15 – 3(x + 2) ??????????????????????

Answers

Answer:

-3x + 9

Step-by-step explanation:

150 miles in 6 gallons

Answers

Answer:

uh thanks for the points

Step-by-step explanation:

Answer:

Step-by-step explanation:

For example, suppose it takes you 15 minutes to travel 6 miles. The time elapsed is 15 minutes divided by 60 minutes = 0.25 hours, and your speed is 6 miles divided by 0.25 hours which equals 24 mph.

For an average person:

1 mile = 2,000 to 2,500 walking steps

1 km = 1,250 to 1,550 walking steps

10,000 steps = 4 to 5 miles

Yolanda has 1/6 cup ladle that she uses to pour gravy over potatoes she uses one full ladle for each serving for each server potato

Answers

Answer: what is the question

Step-by-step explanation:

help plssss i give brainliest

Answers

Answer:

(7, - 2 )

Step-by-step explanation:

Given the 2 equations

x = - 3y + 1 → (1)

- 3x - 3y = - 15 → (2)

Substitute x = - 3y + 1 into (2)

- 3(- 3y + 1) - 3y = - 15 ← distribute and simplify left side

9y - 3 - 3y = - 15

6y - 3 = - 15 ( add 3 to both sides )

6y = - 12 ( divide both sides by 6 )

y = - 2

Substitute y = - 2 into (1) for corresponding value of x

x = - 3(- 2) + 1 = 6 + 1 = 7

solution is (7, - 2 )

which is bigger or equal 6 gallons or 96 pints

Answers

Answer:

96 pints

Step-by-step explanation:

Help me for a cookie

Answers

Answer:

145 degrees

Step-by-step explanation:

1. A straight line is 180 degrees

2. 180-35=145

Suppose 65% of jurors come to a just decision. In a jury of ten people, what is the probability more than half come to a just decision? 0.7515 0.2485 0.0949 0.8374 0.9051

Answers

Answer: 0.7515

Step-by-step explanation:

Binomial probability formula:

[tex]P(X=x)=\ ^nC_xp^x(1-p)^{n-x}[/tex] , where

n = total number of trials.

p= probability of success in each trial.

x= Number of successes.

Let x be a binomial variable that represents the number of jurors come to just decision.

p= 0.65

n= 10

Required probability= [tex]P(x>5)=P(x=6)+P(x=7)+P(x=8)+P(x=9)+P(x=10)\\\\ =\ ^{10}C_6(0.65)^6(0.35)^4+ ^{10}C_7(0.65)^7(0.35)^3+ ^{10}C_8(0.65)^8(0.35)^2+ ^{10}C_9(0.65)^9(0.35)^1+^{10}C_{10}(0.65)^{10}(0.35)^0\\\\=0.75149550912\approx0.7515[/tex]

Hence, the probability more than half come to a just decision = 0.7515

solve the problem: -10 + +10 =

Answers

It equals zero negative plus positive equals zero

Answer:

0

Step-by-step explanation:

-10+ + 10

-10+10

0

Which point satisfies the system of equations y=3x-2 and y=-2x+3?
8
7
B
6
C
5
4
D
9 8 7 6 5 4 3 -2 -1
1
2 3 4 5 6 7
B
9x
-2
-3
4
-5
-5
-7
-9
ΟΑ. Α
ОВ.
B
Occ
ODD

Answers

Answer:

27633883532

2732937293739

839364923274693

93730347395393649364

027402649249364

026393473849337

92739262926382

193

19632963286392

92539253925292

9279253285292

2283792

88248935392

926263925392

7363854276393

233

y = -3/4x - 2
y = 3/4x + 1
one solution
two solutions
no solution
O infinitely many solutions

Answers

Answer:

One Solution

Step-by-step explanation:

Trust me

El largo de una sala es 2 metros más grande que su ancho. El área es de 80 m?. ¿Cuánto mide de largo? Cuánto mide de ancho?​

Answers

Answer: Translation:  

The length of a room is 2 meters greater than its width. The area is 80 m ?. How long is it? How wide is it?

Step-by-step explanation:

david roller skates with a constant speed of 12kmh how far can he travel in 3 hours

Answers

Answer:

36

Step-by-step explanation:

12 x 3 =36

Answer:

36 kilometers or 22.4 miles

Step-by-step explanation:

12 kmh times 3 equals 36

Drag each number to the correct location on the table. Classify the real numbers as rational or irrational numbers. Please Help I need the answer today!

Answers

Answer:

did you ever figure out what the answer was it was because  working on this and don't know what to do

Step-by-step explanation:

Answer:

Rational Numbers: √400 | -5/250 | 5.012121212...

Irrational Numbers: √1000 | ^3√30 | 0.01562138411...

find a, b (3a- 2) (A+10 ) (3b - 15) (2b +5)

Answers

Eeeeeeeeeeeeeeeeeeee
3a2+30a-2a-20=3a2+28a-20
6b2+15b-30b-75=6b2-15b-75

Answer the photo below thanks

Answers

Answer:

you have it marked correctly-A.1,2

Step-by-step explanation:

they are the same only flipped around

Answer:

A . 1 and 2

Step-by-step explanation:

count the squares

PLEASE HELP ME WITH THIS QUESTION!!!!

ILL GIVE 20 POINTS

Answers

Answer:

D. This was the first time Judicial Review took action in court.

Step-by-step explanation:

The graph of f(x)=x is given which graph represents g(x)=1/3x

Answers

Answer:

Where are the graphs

Step-by-step explanation:

Need serious help with this!!!!!!!!!!!!!!!!!!!

Answers

192 miles is how far it travels

Answer:

240 miles

Step-by-step explanation:

64x3 =192

3/4 of 64 is 48

192 + 48 = 240

Enter the value of 12x-2 when x = 3.

Answers

Answer:

34

Step-by-step explanation:

12(3)-2

36-2

34

Answer:

im sorry if this is wrong but i think its 2

Find the slope of the line that passes through (4,-5) and (-2,9)
a -2/3
b 5/3
c -7/3
d 2

Answers

Answer:

C) -7/3

Step-by-step explanation:

m=(y2-y1)/(x2-x1)

m=(9-(-5))/(-2-4)=(9+5)/-6=14/-6

simplify -14/6 to -7/3

i need help ASAP 6th grade work!!!!! HELP

Answers

Answer:

y=7miles

Step-by-step explanation:

The total perimeter is 21 miles and we know two sides of the triangle are 7 miles, or 14 miles together.

We need to know the one other side of the triangle, so we can subtract the 14 miles we know from the total 21 miles.

21-14=7miles

Answer:

y=7 mi

Step-by-step explanation:

If you know that each side of this triangle is 7 and they are each side is the same length, you can make an educated guess  that the answer is 7. If you need An easier method 7x3=21. a triangle has 3 sides so your answer would be 7

Salma, joe, and alan sent a total of 106 text messages during the weekend, salma sent 9 fewer messages than alan. Joe sent 3 times as many messages as alan. How many messages did they each send?

Answers

Answer:

Salma, joe, and alan sent 14, 69, and 23 text messages respectively

Step-by-step explanation:

Given that Salma, joe, and alan sent a total of 106 text messages during the weekend, it means that

s + j + a = 106 where s, j, and a are the number of messages sent by Salma, joe, and alan respectively

Given salma sent 9 fewer messages than alan

s = a - 9

Joe sent 3 times as many messages as alan

j = 3a

hence

a - 9 + 3a + a = 106

5a - 9 = 106

5a = 106 + 9

5a = 115

Divide both sides by 5

a = 115/5

= 23

s = 23 - 9

= 14

j = 3* 23

= 69

Grace and her brother Sid want to raise money to go to band camp. Their parents have agreed to help them up to $400 by paying them $25 when one of them mows the lawn and $10 for each hour that one of them babysits their younger brother. They will have to do a combination of both chores in order to earn the money.

Select the equation that represents the number of lawns they can mow, m, and hours they can babysit, b, to earn $400.

Answers

Answer:

I think it would be 25m + 10b = 400

an examination. 30% of the candidates
ailed. If 210 candidatęs passed, how many
Candidates wrote the examination?
1.63 B. 147 C. 210 D. 300 E. 2100

Answers

Answer: D

Step-by-step explanation:

If 30% failed then (100-30)% passed

That is 70%

let x be the number of students that wrote the exam

(70/100)x=210

x=21000/70

x=300

Other Questions
55 PTS! BEST ANSWER WILL GET THE BRAINLIEST! This Mystery Rocks! By Cyntha Schlagel1. The Drifting Rocks are a strange phenomenon still unexplained by science. 2. Located in Death Valley, California, the rocks sit on hot, flat ground. 3. Unlike normal rocks, they have trails etched behind them as if they have traveled across the sand. 4. Some trails are only a few feet. 5. Some trails are over a half a mile long. 6. Each trail is as baffling as the next.7/ The variety of rock movement has baffled scientists for decades. 8. Some rocks seem to roll as they move forward. 9. Some take unexplainable routes. 10. Large ones have traveled past small ones that have stayed still. 11. Some scientists suggest that the rocks are pushed by wind. 12. Others believe they slide on small amounts of ice or mud. 13. So far, research has not confirmed any theory.Which choice best describes how the author organized information? (4 points)A. Cause and effectB. Chronological orderC. Fact by factD. Problem-solution Which of the following drugs is a depressant? -OA. PeyoteB. MarijuanaO C. CaffeineOD. Cocaine when heat is absorbed by the system and work is done by the system on the surroundings thenA. q is negative and w is positive.B. both q and w are positive.C. both q and we are negative.D. q is positive and w is negative.E. both q and Ware zero. What was one of the main results of the Black Death in Europe Why is it significant that Quentin and Margo have a nighttime adventure together before Margo later runs away?A Quentin is so impressed with the brilliance of Margo's acts of revenge that he has fallen deeply in love with her by the time she runs away.B. Quentin enjoys the feeling of being pushed to go beyond his comfort zone and and hopes that by finding Margo, she can continue to play the role of theadventurer in his life.C. Quentin realizes that Margo is self-centered, focused only on how others have wronged her rather than how she may have wronged others.D. This adventure solidifies Quentin's interest and admiration for Margo and cements his desire to find her once she runs away. The map that 1cm =50mile How does carbon dioxide enter the atmosphere?A)Carbon dioxide is only released into the atmosphere by human activities.B)Carbon dioxide is only released into the atmosphere by animals and bacterial decomposers.C)Carbon dioxide is only released into the atmosphere by plants, animals, and bacterial decomposers.D)Carbon dioxide is released into the atmosphere by plants, animals, bacterial decomposers, and human activities. I realllyyy need helppp plssss helppp meee What time horizon should you use for setting your vision?1-2 years3-5 years2-4 years5-10 years Is it mandatory to vote in the US? Does a have to be greater than 1 in standard form? What do production quotas do to price? Wrote an expression that is equivalent to 2.5 +(-5y)-2.5 How do Increases in human use of natural resources affect Earth's systems? Who were the key individuals and organizations that advocated for political and legal reform after stonewall? (LGBTQ HISTORY CLASS) A coin with a head on one side and a tail on the other is tossed, followed by a six-sided die with faces marked 1 through 6 being rolled. If each outcome is equally likely, what is the probability of each outcome? Ms. Henson, a supervisor with five years of experience Given the following equation: 2 KCIO3 2 KCl +302. How many moles of O can be produced by letting 9 moles of KCIO3 react? What are two advantages the British had over the Americans? Complete with an appropriate vocabulary word. 1. l levanta la cuando tiene una 2. Ellos prestan cuando su 3. El 4. El profesor 5. Una nota ensea y los los exmenes. nota baja. 6. Y las muchachas llevan una habla. los exmenes a los alumnos y los alumnos estudian. es una nota alta y una nota y una 7. Los alumnos llevan sus materiales escolares en una es una