1. Dennis made a 500 km trip in five hours. For the first two hours, Dennis had an average speed of 150 km/h. For the last two hours, Dennis had an average speed of 100 km/h. Which of the following is true about Dennis' trip? (25 Points) Dennis must have maintained a constant velocity throughout his trip. Dennis must have maintained a constant speed throughout his trip. O Dennis must have stopped for an hour in the middle of this trip Wich statemeent correctly discribes the locaton and Dennis must have driven without stopping during his trip​

Answers

Answer 1

Answer:

The correct option is;

Dennis must have stopped for an hour in the middle of this trip

Step-by-step explanation:

The given parameters are;

The distance Dennis covered in 5 hours = 500 km

Dennis's average speed in the first two hours = 150 km/h

Dennis's average speed in the last two hours = 100 km/h

Therefore;

Dennis traveled 150 km/h × 2 h = 300 km in the first two hours

Dennis traveled 100 km/h × 2 h = 200 km in the last two hours

Which gives, Dennis traveled 300 km + 200 km in  2h + 2h = 4h

Therefore, Dennis traveled 500 km in 4 hours and Dennis must have stopped for an hour in the middle of this trip.


Related Questions

Solve the compound inequality. 3x − 4 > 5 or 1 − 2x ≥ 7 A. x ≤ −3 or x > 3 B. x −3 or x ≤ 3

Answers

Answer: B

Step-by-step explanation:

Answer i guess its b then

Step-by-step explanation:

Leah would like to earn at least $120 per month. She babysits for $5 per hour and works at an ice cream shop for $8 per hour. Leah cannot work more than a total of 20 hours per month. Let x represent the number of hours Leah babysits and let y represent the number of hours Leah works at the ice cream shop.

Which pair (x, y) represents hours that Leah could work to meet the given conditions? Select all that apply.

A.
(2.5, 15)

B.
(5, 20)

C.
(7.5, 12.5)

D.
(17.5, 5)

E.
(19, 1)

Answers

Answer:

A,B and C

Step-by-step explanation:

Find the slope of the line that passes through (7,2) and (3,3)​

Answers

Answer:

1 over 4

Step-by-step explanation:

Answer:

the answer is [tex]\frac{1}{-4\\}[/tex]

Step-by-step explanation:

slope= [tex]y_{2}[/tex]-[tex]y_{1}[/tex]

           [tex]x_{2}[/tex]-[tex]x_{1}[/tex]   so 3-2=1 and then 3-7=-4

This does not make sense to me

Answers

to find area you have to multiply length x width. so to find your answer the equation should be 15/22 x 2/5

[tex]\frac{3}{11}[/tex]

The difference of twice a number and 9

Answers

Answer:

I belive that the answer is 8

Answer:

10 and 8 and 18,

Step-by-step explanation:

first of all 18 is half of 19, and 10 and 8 are between 9

The area of on field is 16 acres, the area of the second field is 1 1/4 times bigger. A barn of wheat on the first field makes up 37 1/2 thousands pounds per acre, and on the second 1 2/15 as much per acre, how much more was gathered on the second field than the first?

Answers

Answer:

250 thousand pounds

Step-by-step explanation:

Given that:

Area of field 1 = 16 acres

Area of field 2 = 1 1/4 bigger than field 1

Barn of wheat on field 1 = 37 1/2 thousands pounds per acre

Barn of wheat on second field = 1 2/15 as much as field one per acre

Total pounds gathered on field 1 :

37 1/2 * 16 = 600 thousand pounds

Area of second field :

1 1/4 * 16 = 5/4 * 16 = 20 acres

Barn of wheat per acre = 1 2/15 * 37 1/2

= 17/ 15 * 75/2 = 42 1/2 thousand pounds per acre

Total = 42 1/2 * 20 = 850 thousand pounds.

850 - 600 = 250 thousand pounds

Which expression is equivalent to 28 + 64?

2(14 + 40)

2(14 + 40)

4(7 + 16)

4(7 + 16)

4(24 + 32)

4(24 + 32)

8(20 + 56)

8(20 + 56)

Answers

Answer:

4(7 + 16)

Every other answers does not equal 92

28+64=92

4(7+16)

7+16=23

23x4=92

Helpppp with this plssss

Answers

Answer:

26.411

Step-by-step explanation:

In 3a+bc-c you have to substitute

a=8.6, b=2.3, c=0.47

3*8.6 + 2.3*0.47 - 0.47 first do the multiplication then addition and subtraction

25.8 + 1.081 - 0.47=

26.411

Guys plssssssss! I want to spend time today and tomorrow with my fam before they go back to Washington

Answers

Answer:

10) It increased by appoxamately 17%.

11) 255 decreased by 20%

12) 15 increased by [tex]66\frac{2}{3}[/tex]%

13) $9,450

14) $149.8

15) $238.5

Step-by-step explanation:

10) 170 is greater than 150 by 25. 25 is [tex]16\frac{2}{3}[/tex]% of 150, so it increased by appoxamately 17%.

11) 225 is decreased by 45. 45 is 20% of 100, so 255 decreased by 20%

12) 15 is increased by 10. 10 is [tex]66\frac{2}{3}[/tex] of 15, so 15 increased by [tex]66\frac{2}{3}[/tex]%

13) 5% of 9,000 is 450. 450 + 9,000 is $9,450

14) 7% of 140 is is 9.8. 140 + 9.8 = $149.8

15) 6% of 225 is 13.5. 225 + 13.5 = $238.5

THE LENGTH AND THE BREADTH OF A RECTANGULAR PARK ARE IN THE RATIO 5 : 2. IF ITS PERIMETER IS 168m, FIND ITS LENGTH AND BREADTH.


(STEP BY STEP PLZ) (HOPE U ENJOY IT)​

Answers

Answer:

Length = 60m, breadth = 24m

Step-by-step explanation:

Let the length of the park be 5x and the breadth 2x.

5x+5x+2x+2x = 168

14x = 168

x = 168 ÷ 14

x = 12

Length (5x) = 12 × 5

                   = 60

Breadth (2x) = 12 × 2

                    = 24

Answer:

Length = 60m, breadth = 24m

PLEASE HELP I AM TIMED!

Answers

Answer:

i believe it would be 45 is greater than or equal to 3x + (3x-1) + [(3x-1)-4]

I hope you pass. Plz correct me If I am wrong

Step-by-step explanation:

Triangle QRS is transformed as shown on the graph. Which rule describes the transformation?​

Answers

Answer:

270°

Step-by-step explanation:

(x , y) --> (y, -x)

90° clockwise rotation

270° anti-clockwise rotation

45 POINTS IF YOU STEAL POINTS IM REPORTING YOU I NEED THE ANSWER
Caisha has a circular garden with a radius of 4 ft. She needs to put a layer of soil on top. Each bag of soil covers 9.42 square feet. How many bags of soil will she need to buy? 5 bag 6 bags 7 bags 8 bags

Answers

Answer:

5

Step-by-step explanation:

A = 50.2654825

idk it could be 6

9 is 3% of what number? Which proportion matches this information?

Answers

Answer:

B

Step-by-step explanation:

3% = 3/100

So we can eliminate the first answer.

The proportions have to match each other so the number nine should be above and thus the x has only the option of being under it.

As a result, we eliminate the third answer and remain with one reasonable answer

What is an equation of the line that passes through the points (-4, -1)and (3, -8)
Put your answer in fully reduced form.

Answers

I'm pretty sure the answer is 0 because (-4,1) - (3,-8) gets you 0

PLEASE HELP WILL GIVE BRAINLIEST IF CORRECT
figure out the miles per hour (mph)
1. what is the mph if the time is 1 hour 42 min and the distance is 935 miles?
2. what is the mph if the time is 36 min and the distance is 330 miles?

Answers

Answer:6.67 for number 1

Step-by-step explanation:

Answer:

Answer 1 is 550

and 2 is also 550

Step-by-step explanation:

HELP ASAP PLEASE WILL MARK BRAINIEST

Answers

Answer:

40

Step-by-step explanation:

how do solve slope and for the y axis?

Answers

Answer:

Slope = rise/run or y2-y1/x2-x1 (change in y over change in x)

Y-intercept (I'm assuming you mean y-intercept instead of y axis) = if there's a graph, find where the line intersects the y axis, if there isn't a graph, use y=mx+b to solve for b, the y-intercept.

Hope this helps!

slope the the rise over the run and slope is where the slope hits the y axis

In one month, a cell phone company charges $50 and additional $0.05 for each text message. The company charged Christian $80 for October. How many text messages did Christian send in October?

Answers

Answer:

He has 1000 text messages.

Step-by-step explanation:

50 for a month and 0.05 for every text message

0.05x100=5

0.05x1000=50

If a 90°degree angle is bisected, the two angles created by the bisector will equal?

Answers

Answer:

45 degrees

Step-by-step explanation:

when an angle is bisected both angles formed are equal, so 90/2=45

yes, if it says it’s bisected it means the angle will be divided into half.

I added pics cause it’s 2 in the morning.. I’m having back pain, thigh pain, cramps EVERYWHERE.. headache and just finished babysitting my baby brother.. help a gurl out please

Answers

Answer:

7^39

Step-by-step explanation:

[tex](7^{13})^{3} * 7^{0} \\\\(7^{13*3}) * 1 \\\\=7^{39}[/tex]

Rita is hiking along a trail that is 13.7 miles long. So far she has hiked ond tenth of the trail.
How far has rita hiked

Answers

Answer: 1.37 miles

Step-by-step explanation:

13.7=100%

13.7/10=1.37=10%=1/10

1. 3(6a); for a=3
2. 5d(4); for d=-2​

Answers

Answer:

Step-by-step explanation:

1. Solution for 3(6a)a=3 equation:

Simplifying

3(6a) * a = 3

Remove parenthesis around (6a)

3 * 6a * a = 3

Multiply 3 * 6

18a * a = 3

Multiply a * a

18a2 = 3

Solving

18a2 = 3

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Divide each side by '18'.

a2 = 0.1666666667

Simplifying

a2 = 0.1666666667

Take the square root of each side:

a = {-0.408248291, 0.408248291}

2.Solution for 5d(4)d=-2 equation:

Simplifying

5d(4) * d = -2

Reorder the terms for easier multiplication:

5 * 4d * d = -2

Multiply 5 * 4

20d * d = -2

Multiply d * d

20d2 = -2

Solving

20d2 = -2

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Divide each side by '20'.

d2 = -0.1

Simplifying

d2 = -0.1

Reorder the terms:

0.1 + d2 = -0.1 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0

0.1 + d2 = 0.0

Write each percent as a decimal. 1.) 22% 2.) 75% 3.) 6% 4.) 189%

Answers

Answer:

xztghdrtjgxzdrf

Step-by-step explanation:

1) .22 2) .75 3) .06 4) 1.89

pls help will give brianly for help Find the quotient:

–20 ÷ 5

Answers

Answer:

The answer is -4 :)

Step-by-step explanation:

Answer:

-20 divided by 5 = -4

Step-by-step explanation:

Pumpkin pie is on sale for $12.50. How much will it cost to buy enough to feed 20 people? Please help me!

Answers

Answer:

$37.05

Step-by-step explanation:

thats what i got so it might not be right

I need help take all my points I really need help .

Answers

Answer:

1. Median

2. 4.5

Step-by-step explanation:

There are 10 numbers so the median is 4 and 5 which makes the median 4.5.

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

Answer:

1. Median

2. 4.5

Step-by-step explanation:

There are 10 numbers so the median is 4 and 5 which makes the median 4.5.

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

Select the correct answer.
Which statement is false?

A.
The inequality sign always opens up to the larger number.
B.
The greater number in an inequality is always above the other number on the vertical number line.
C.
The smaller number in an inequality is always located to the left of the other number on the horizontal number line.
D.
The inequality sign always opens up to the smaller number

Answers

C The smaller the number in an inequality is always located to the left of the number on the horizontal line!!

Answer:

I think it might be C or B

Step-by-step explanation:

Hope this helped have a nice day :)

Devon wants to build a rope bridge between his treehouse and Cheng's treehouse.
Suppose Devon's treehouse is directly behind Cheng's treehouse. At a distance of 20
meters to the left of Devon's treehouse, an angle of 52° is measured between the two
treehouses. Find the length of the rope.
A. 36.7
B. 4.2
C. 16.9
D. 25.6

Answers

I think the answer would be D. 25.6

idk men PLEASE HELP!

Mr. Villamayor rented a construction crane for five hours and a backhoe for seven hours. The total amount he paid is less than Php 9,000. Suppose the hourly rate for the crane is Php 800. What is the maximum amount he paid for the backhoe to the nearest hundreds?​

Answers

Answer:

Let 7x be the rent paid for backhoe for seven hours.

Step-by-step explanation:

Keyword: maximum amount, the most

    Inequality symbol:  ≤

     (800 × 5) + 7x ≤ 9,000

     4,000 + 7x ≤ 9,000

     7x ≤ 9,000 - 4,000

     7x ≤ 5,000

     7x ÷ 7  ≤  5,000 ÷ 7

     x ≤ 714.29

To the nearest hundreds:

     x ≤ 700

ANSWER:  The maximum rental fee per hour  of backhoe is Php 700.00 (rounded off to the nearest hundreds).

To check if he paid less than 9,000 for the total rent:

    (800 × 5) + (700 × 7) < 9,000

    4,000 + 4,900 < 9,000

    8,900 < 9,000    (True)

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