- Circle the letter of the sentence that explains why no machine is 100 percent efficient a. Electrical energy is converted to mechanical energy by fuel. b. Mechanical energy is converted to thermal energy by friction C. Thermal energy is converted to mechanical energy by friction. d. Mechanical energy is converted to electrical energy by a spark​

Answers

Answer 1

Answer:

d

Step-by-step explanation:

Answer 2

Answer:

b i think

Step-by-step explanation:


Related Questions

Which expression below is equivalent to -3x+5(x+2).

Answers

Use photo math it helps a lot

Please help me fast!!!! Joe and his family are touring Chicago. They want to visit the Willis Tower, hang out at Navy Pier, and shop on Michigan Avenue before their dinner reservations at 5:10 P.M. They plan to spend 1 hour and 10 minutes at the Willis Tower, 3 hours and 10 minutes at Navy Pier, and 1 hour and 15 minutes shopping. What is the latest time Joe's family can start their tour of Chicago and still make it to dinner on time?

Include A.M. or P.M. in your answer.

Answers

AM so they can have more time

The chart shows the games won and lost for four local teams.
Team
Games Won Games Lost
3
6
6
5
Alligators
Bengals
Cougars
Dragons
7
3
3
1
Which team has the highest ratio of wins to losses?
O A. Alligators
O B. Bengals
O c. Cougars
OD. Dragons

Answers

Answer:

D

Step-by-step explanation:

3:1=3/1=3 and 3 has the highest value.

Answer:

The Dragons

Step-by-step explanation:

Alligators: 3:6=3/6=1/2

Bengals: 6:5=6/5=1 1/5

Cougars: 7:3=7/3=2 1/3

DRAGONS: 3:1=3/1=3

Therefore, the dragons is the answer because 3 is highest value:)

Owen and his children went into a restaurant where they sell hotdogs for $4 each and tacos for $2.50 each. Owen has $60 to spend and must buy a minimum of 18 hotdogs and tacos altogether. If xx represents the number of hotdogs purchased and yy represents the number of tacos purchased, write and solve a system of inequalities graphically and determine one possible solution.

Answers

Anser:

5 hotdogs and 16 tacos

Step-by-step explanation:

5 x 4 = $20

2.50 x 16 = $40

20 + 40 = $60

$9: 4 visitors - $18 : 8 visitors proportion or non proportion

Answers

Answer:

That would be proportionate

Step-by-step explanation:

Just compare the two ratios

9/4

18/8

they are the same if you find the lcm of both

18/8

18/8

Kurtz math class starts at 8:10 AM and lattice for 35 minutes after math class Kurt has recess for 15 minutes what time does recess end

Answers

Answer:

9:10AM

Step-by-step explanation:

luis wrote a story the number of pages in his story has 17 tens and 9 ones he wrote the number 791 to show the number of pages it luis correct if so explain why?

Answers

Answer:

no he is not

Step-by-step explanation:

17 tens + 9 ones

17(10) + 9(1)

170 + 9

179

he wrote 791 but the correct answer should be 179

**Help Fast Please!!**
Solve by completing the Square or Using the Quadratic Formula.
X^2+7x+3=0
Show all work (All steps for solving and simplifying) for credit.

Answers

Answer:

looooooooooooooollll

Step-by-step explanation:

4) Millions of Americans work full-time at or near minimum wage. Still, many of them struggle to
afford rent, childcare, and other expenses and rely on public assistance programs such as food
stamps and Medicaid. To help these "working poor,” some people think the government should
raise the minimum wage from $7.25/hour to $15/hour. If this happened, how do you expect it
would impact workers at the restaurant?
US
DELL

Answers

Answer:

trick question

Step-by-step explanation:

The workers would be effected by having more money for the same amount of time. But things would also get more expensive because everyone get a raise

#2: List the numbers shown below in order from least to greatest. USE A COMMA
TO SEPARATE. *
-12, 23, 18, 12, -19, -25,8
HELP ASAP

Answers

Answer:

-25 < -19 < -12 < 8 < 12 < 18 < 23

Step-by-step explanation:

Sorry if im wrong

The ratio of three numbers is 4 : 5 : 3. The sum of the numbers is 54. List the numbers in ratio form.

Answers

Answer:

13.5 : 18 : 22.5.

Step-by-step explanation:

let the numbers be 3x , 4x and 5x

3x+ 4x + 5x = 54

12x = 54

x = 4.5

so the numbers are 3*4.5, 4 * 4.5 and 5 * 4.5

= 13.5, 18 and 22.5.

The list of the numbers in ratio form is 18 : 22.5 : 13.5

Given the ratio of three numbers as 4 : 5 : 3

Total ratio = 4 + 5 + 3

Total ratio = 12

If the sum of the numbers is 54.

For the ratio of 4:

= 4/12 * 54

= 1/3 * 54

= 18

For the ratio of 5:

= 5/12 * 54

= 270/12

= 22.5

For the ratio of 3:

= 3/12 * 54

= 1/4 * 54

= 13.5

Hence the list of the numbers in ratio form is 18 : 22.5 : 13.5

Learn more here: https://brainly.com/question/19793310

Whitney was visiting Big Bend Ranch
State Park. At the entrance, she saw a
map of the park. The legend stated
that 1.5 inches on the map represents
20 feet in the park. On the map, how
many inches would represent 60
actual feet?

Answers

Answer:

4.5 inches on the map would represent 60 actual feet.

Step-by-step explanation:

Given that:

1.5 inches on map represents 20 feet in the park.

x be the inches on map that represents 60 feet in the park.

Ratio of distance on map to actual distance :: Ratio of distance on map to actual distance

1.5 : 20 :: x : 60

Product of mean = Product of extreme

20*x = 1.5*60

20x = 90

Dividing both sides by 20

[tex]\frac{20x}{20}=\frac{90}{20}\\x=4.5[/tex]

Hence,

4.5 inches on the map would represent 60 actual feet.

My homework says, "Does the graph represent a proportional relationship? Why or why not? You MUST explain to get credit."

Answers

Answer:

No, the graph does not represent a proportional relationship. It is a straight line, but it does not intersect the point (0, 0). ... It's not proportional because the line does not cross through the origin. Therefore the ratio of x to y will be different for two different points on the line.

Divide to Find Equivalent Ratios
Given the ratio of 6 foot 72 inches, how many inches are equivalent to 3 feet

Answers

Answer:

4 are equivalent to 3 feet with 6 feet 72 inches.

Step-by-step explanation:

I'm in war and need brainiest to win plzzz you wont regret .

Solve the system using any method.
y=3.50-2
y=-1.9x+4.48
The system has no solution, ().

Answers

Answer:

Did you mean 3.50x? If so, It would be (1.2, 2.2). If you meant just 3.50, it would be (1.56, 1.5)

Hope this helps!

Typing 731 words in 17 minutes

Answers

Answer:

im just testing this but if you did that you would be slow as heck.

Step-by-step explanation:

17 minutes is decent so...

what is 4+n/3=2


the slash is a fraction

Answers

Answer:

n = -6

Step-by-step explanation:

4 + [tex]\frac{n}{3}[/tex] = 2

[tex]\frac{n}{3}[/tex] = -2

n = -6

Answer:

n = -6

Step-by-step explanation:

4 + n/3 = 2

subtract 4 from both sides

n/3 = 2 -4

n/3 = -2

multiply both sides by 3

n = 3(-2)

n = -6

HELP PLEASE whats the answer giving brainliest math btw lol

Answers

Answer:

The person above or below is correct.

Step-by-step explanation:

Can I have Brainliest?

39.8 divided by 4 estimate

Answers

Answer:

10

Step-by-step explanation:

40/4=10

Answer:

39.8 / 4 = 9.95

My explanation is above

At the garden shop, each small tree costs $125 and each large tree costs $275.

How much will 3 small trees and 1 large tree cost?

Answers

If one small tree costs $125 then you will times that by 3 then add $275 your answer should be $650

Please help! I’ll do anything I’ll give u brainly!

Answers

Answer:

y>0.5

Step-by-step explanation:

Rearrange the equation so "y" is on the left and everything else on the right.

Plot the "y=" line (make it a solid line for y≤ or y≥, and a dashed line for y< or y>

Shade above the line for a "greater than" (y> or y≥)

or below the line for a "less than" (y< or y≤).

y+x>1

-y      -y

x>1-y

2x+y<3

   -y    -y

2x<3-y

divide by 2

x<1.5-y/2

1.5-y/2>1-y

-1.5+y   -1.5+y

y>0.5

Pls helppppppppoppppppp

Answers

Answer:

H. 3[tex]\frac{3}{4}[/tex]feet

Step-by-step explanation:

Length of scale drawing = [tex]\frac{3}{12}[/tex] × 15feet

                                        = 3[tex]\frac{3}{4}[/tex]feet

Help me plz I need lots of help

Answers

Answer:

18x + 16

Step-by-step explanation:

(Not simplest form) 9x + 9x + 8 + 8

To get simplest form, just add the terms and integers together, which in this case would give you 18x + 16.

What is a non negative rational number

Answers

Answer:

A non negative ration number is a point between a whole number a a decimal fraction (i.e. 1.25) fractions. any part of a group number or whole. numerator. number above the line of a fraction, showing number of parts of the whole.

Step-by-step explanation:

If $m \Diamond n = (m^2 - n) \div n$ for all real numbers $m$ and $n$, where $n \neq 0$, what is the value of $6 \Diamond 3$?

Answers

By definition of ◇, you have

6 ◇ 3 = (6² - 3)/3 = (36 - 3)/3 = 33/3 = 11

PLS HELP FIRST TO ANSWER GETS BRAINLEST

Al has 3 pair of shorts, 4 shirts, and 3 pair of sneakers. How many different outfits could he make?

Answers

Answer:

24

multiply them

Step-by-step explanation:

1s-1t-1n

1s-2t-1n

1s-3t-1n

1s-4t-1n

1s-1t-2n

1s-1t-3n

2s-1t-1n

2s-2t-1n

2s-3t-1n

2s-4t-1n

2s-1t-2n

2s-1t-3n

3s-1t-1n

3s-2t-1n

3s-3t-1n

3s-4t-1n

3s-1t-2n

3s-1t-3n

The football team has a total of 50 jerseys. There are 5 medium-sized jerseys. What percent of the jerseys are​ medium-sized jerseys?

Answers

The answer would be 10%
The baser can you be 10%

I really need help. Please help me!!!!

Answers

b is the correct answer i believe

The height of a model rocket, H(t), is a function of the time since it was launched, t.What is the domain of H(t)?A.0 ≤ t ≤ 324B.0 ≤ t ≤ 36C.t ≤ 324D.t > 0​

Answers

Answer:

[tex]0 \le t \le 36[/tex]

Step-by-step explanation:

Given

The graph of h(t)

Required

Determine the domain

t represents the horizontal data and according to the graph;

The value of t starts at 0 (the beginning of the curve)

and ends at 36 (the end of the curve)

These values are the domain of the graph, and it can be represented as: [tex]0 \le t \le 36[/tex]

The domain of H(t) is [tex]0\leq t\leq 36[/tex]

The correct answer is option B. 0 ≤ t ≤ 36

To do this question, the main thing is to look at picture.

We know from the graph that this is a quadratic function, So t has to be less than some positive number.

{ if t → -∞, H(t) → -∞, not in the line with the actual situation}

and look at the graph, the point where H(t) equals zero, one is 0 and one is 36.

Therefore: the domain of H(t) is [tex]0\leq t\leq 36[/tex].

For more information:-

https://brainly.com/question/7729758

Find the slope of each line using tables . try using the slope formula

Answers

Answer:

Step-by-step explanation:

(-3, 4) (-1, 9)

(9-4)/(-1+3) = 5/2

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At first, I thought they were only gawking at my camera, but their eyes moved from my hair to my sweater, down to my shoes, then back and forth at each other.3 I shrugged and swallowed and didnt look at any of them, my heart still pounding like bongos in a band.4 Miss Willis, theres your seat, over there. Take it, wont you please. Mr. McCurdy pointed to an empty desk toward the front of the room. I sat down, cradling my camera in my lap. I carefully looked right, then left.5 Mr. McCurdy rubbed his hands together. Now listen up. Today were starting our unit on great American poets. Who can name some?6 The other kids were slow to answer, so I raised my hand. When Mr. McCurdy called on me, I cleared my throat. That lump was still resting there from before. Langston Hughes, I said softly.7 Hughes. L-a-n-g-s-t-o-n H-u-g-h-e-s. Mr. McCurdy wrote the poets name on the blackboard.8 Langston who? asked a red-haired girl sitting next to me.9 I thought everybody knew who Langston Hughes was. I sucked my teeth silently and folded my arms. Then I glanced around to get a better look at the red-haired girl.10 Hughes. A fine poet. One of our best, Mr. McCurdy was saying. Miss Willis, stand up, please, and expand on Langston Hughes. I pushed my glasses up on my nose and stood up.11 Well, sure, I said, watching the red-haired girl out of the corner of my eye. Langston Hughes was an African-American poet who got popular in the 1920s and 1930s. He wrote plays and essays too. I spoke slowly and carefully. My fidgety heart started to beat regularly again.12 And Langston Hughes helped shape what is known as the Harlem Renaissance,1 Mr. McCurdy explained.13 He spent a year in Mexico with his father after he was done with high school, I added.14 Born in Joplin, Missouri, Mr. McCurdy said.15 His poem The Weary Blues won him a prize. Mr. McCurdy and I, we were on a roll.16 The Weary Blues turned out to be the title of Hughess first book of poems, published in 1926, he said.17 Id never had a teacher go on with me like that. Mr. McCurdy knew a lot about Langston Hughes. He looked pleased that I knew almost as much as he did. In his broken-hinge voice, he said, Thatll be all for now. Your seat, Miss Willis. You may take it.18 Everybody got quiet; I guess they were waiting for me to sit down. But I didnt want to take my seat; I didnt want to take any seat. I was just getting started. Those kids were still staring, still checking me out. I wanted to tell them more about Langston Hughes, and about the other African-American poets who are my favoriteslike Gwendolyn Brooks and Nikki Giovanni.19 The red-haired girl was paying attention, listening to me and Mr. McCurdy talk about Langston Hughes. I dont think she knew what to make of me. 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