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
tresset_1 [31]
3 years ago
13

A delivery company estimates that it will take 4 minutes for their drone to fly 7 km how long will it take the drone to fly 21 k

m
Mathematics
2 answers:
forsale [732]3 years ago
7 0

Answer: 12 minutes.

Step-by-step explanation:

It is easy to put the numbers into a ratio form to work it out. So-

4 minutes for 7 km = 4 : 7

Then ? minutes for 21 km = ? : 21

You first divide the given value by the original value of that it is proportioned to (the number on the same side of the original ratio as 21). In this case divide 21 by 7 = 3. You now have to times the answer you got by the other original value which will be 4 x 3 = 12.

Therefore your answer is 12 minutes.

yawa3891 [41]3 years ago
6 0

Answer: 12 minutes

Step-by-step explanation:

7 km ........ 4 minutes

21 km ...... ?

21/7 x 4= 12 minutes

You might be interested in
The difference between a number x and 18 is 22?
Elenna [48]
X-18=22
18+22=x
18+22=40
3 0
3 years ago
A certain four​-cylinder combination lock has 50 numbers on it. to open​ it, you turn to a number on the first​ cylinder, then t
kumpel [21]

A certain four​-cylinder combination lock has 50 numbers on it.

It is a four cylinder combination lock

Each cylinder has 50 numbers

So we have to choose 4 numbers for 4 cylinders

_____ , ______ , ______, _____

you turn to a number on the first​ cylinder

We have 50 numbers so we have 50 combinations

__50___ , ______ , ______, _____

Repetitions are allowed so we do the same for remaining three

50 , 50 , 50 , 50

50 * 50 * 50* 50 = 6250000

There are 6250000 different lock combinations .

7 0
3 years ago
Read 2 more answers
The cost of staying in a hotel is given by the formula C=50d+20, where C is the cost in £ and d is the number of days a person s
Fynjy0 [20]

Answer:

a) £320

b) £720

c) 2 days

Step-by-step explanation:

The question is all about inputting values and finding a result or rearranging and finding a result.

a) d = 6. C = 50(6)+20      = 320

b) d = 2x7 (7 days a week)  C = 50(2x7) + 20     = 720

c) C = 120 ... 120 = 50d+20

100 =50d      d = 100/50      = 2

3 0
2 years ago
Can someone plz help me with this one problem plz!!!
Vlad [161]

Answer:

Yes it does because 985 is equal to 985.

4 0
3 years ago
Read 2 more answers
Solve ( x - 2)( x + 7) =0
lara31 [8.8K]

Answer:

x = 2 or

x = -7

Step-by-step explanation:

(x - 2)(x + 7) = 0

x - 2 = 0

Add 2 to both sides

x - 2 + 2 = 2 + 0

x = 2

OR

x + 7 = 0

Subtract 7 from both sides

x + 7 - 7 = 0-7

x = -7

Therefore

x = 2 or

x = -7

6 0
3 years ago
Other questions:
  • I cannot understand this AT ALL. for some reason..help?
    15·1 answer
  • 119/10 as a mixed number
    10·1 answer
  • write the standard form of the equation of the circle with radius and center (h,k). r =4; (h,k) = (-2,-3) nee help please answer
    11·2 answers
  • You have 4/6 of a cup of lemonade concentrate. If you mix 1/3 of a cup of the concentrate with a quart of water you make a small
    7·1 answer
  • Find the value of n in n5=32
    6·2 answers
  • Last week, Jason ran 26.1 miles. He wants to run further this week. He plans to run 2.4 miles to the park, four times around the
    10·2 answers
  • What is 9 006 in word​
    6·2 answers
  • Solve.<br> 3.5 x (5.8 - 7.09) =
    11·1 answer
  • Can someone tell me what this figure is HEEEEEEEEEELP !!!!!!!<br><br>​
    8·2 answers
  • There was a gallon of juice on the table and Nicco drank one pint of the juice and his friend Andrew drank one pint too. how muc
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!