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
I am Lyosha [343]
3 years ago
14

An airplane is preparing to land at an airport. It is 42,000 feet above the ground and is descending at the rate of 3,300 feet p

er minute. At the same​ airport, another airplane is taking off and will ascend at the rate of 2,700 feet per minute. When will the two airplanes be at the same altitude and what will that altitude​ be?
Mathematics
1 answer:
Fudgin [204]3 years ago
3 0

Answer:

7 minutes

Step-by-step explanation:

From the question :

Descent = ascent

Initial height * descent rate = initial position * ascent rate

Plane on ground is at an initial position or height of 0

42000 - 3300t = 0 + 2700t

Where, t = time

-3300t - 2700t = 0 - 42000

-6000t = - 42000

t = 42000 / 6000

t = 7 minutes

You might be interested in
У=-3x+3<br> y = -9x + 15
julia-pushkina [17]

Answer:

(2, - 3 )

Step-by-step explanation:

Given the 2 equations

y = - 3x + 3 → (2)

y = - 9x + 15 → (2)

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

- 3x + 3 = - 9x + 15 ( add 9x to both sides )

6x + 3 = 15 ( subtract 3 from both sides )

6x = 12 ( divide both sides by 6 )

x = 2

Substitute x = 2 into either of the 2 equations and solve for y

Substituting into (1)

y = - 3(2) + 3 = - 6 + 3 = - 3

solution is (2, - 3 )

8 0
2 years ago
Last year, James earned £1,100 per month. This year, he's had a 4% increase in his monthly pay. He worked 40 hours per week for
avanturin [10]

Answer:

A = £7.15 per hour

James' average pay per hour this year is £7.15 per hour

Step-by-step explanation:

Given;

Last year pay = £1,100 per month

This year, he's had a 4% increase in his monthly pay

This year pay P = 1,100 + 4% of 1,100 = 1,100 +1,100(0.04)

This year pay P = £1,144 per month

Yearly pay Tp= 12 × P = 12 × £1,144 = £13,728

Number of hours worked this year;

He worked 40 hours per week for 48 weeks in the year

N = 40 hours per week × 48 weeks per year

N = 1920 hours per year

Average pay per hour this year A;

A = Yearly pay/Number of hours worked this year

A = Tp/N

A = £13,728/1920hours

A = £7.15 per hour

James' average pay per hour this year is £7.15 per hour

5 0
2 years ago
Please Help me on this question
zlopas [31]

Answer:

yellow

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Highest common factor of 18 and 22​
yuradex [85]

Answer:

2

Step-by-step explanation:

18 = 2 × 3 × 3

22 = 2 × 11

choose the number that appears most

which is 2

3 0
3 years ago
Read 2 more answers
Please help solve the equation using cos(no links)
Alex777 [14]

Answer:

cos 52 = 11/alpha ---> alpha = 11/cos52 = 17.9

5 0
2 years ago
Other questions:
  • Write as a product: ax^2+ay^2–bx^2–by^2+b–a
    10·1 answer
  • 6x + 3y = -6 2x + y = -2 A. x = 0, y = -2 B. infinite solutions C. x = -1, y = 0 D. no solution
    12·1 answer
  • What is the value of 12(3x+5x) when x=7
    12·2 answers
  • 3 to the second power times 3 to the 4th power
    14·2 answers
  • 23. Mr. Russo has 2856 raffle tickets that he will
    15·1 answer
  • Need help with this question
    14·1 answer
  • I need answers to all
    7·2 answers
  • Will reward the best answer brainliest.
    6·1 answer
  • A bag contains 5 blue, 3 red, 6 green, 9 orange, and 20 black marbles. What is the ratio of the number of blue marbles to the nu
    12·2 answers
  • Solve for x if AB = 5x and BC = 3x + 24.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!