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
Sever21 [200]
3 years ago
9

Mechanics paper/Math (please helpp!!!)

Mathematics
1 answer:
sp2606 [1]3 years ago
4 0

Answer:

  (i) 15 m, 6 m/s

  (ii) 90 m

Step-by-step explanation:

(i) For some acceleration (a) from rest, the distance covered (d) in time t is ...

  d = (1/2)at^2

The distance covered by Ben in the 5 seconds he is accelerating is ...

  d = (1/2)(1.2 m/s²)(5 s)² = 15 m

Of course, Ben's speed at that point is ...

  s = (1.2 m/s²)(5 s) = 6 m/s

__

(ii) When Ben has been walking 5 s, Alan has been walking 10 s, so Alan has covered (10 s)(4 m/s) = 40 m. Their distance difference of 40 -15 = 25 m is being made up at the rate of their speed differences: (6 m/s) -(4 m/s) = 2 m/s.

It will take (25 m)/(2 m/s) = 12.5 s additional time for Ben to catch Alan. In the 22.5 s that Alan has been walking before they meet, he will have walked ...

  (22.5 s)(4 m/s) = 90 m . . . the distance OP

You might be interested in
Help me out with this problem ?​
3241004551 [841]

Answer:

(-4.5, 2.5)

Step-by-step explanation:

The solution for two graphed linear equations is the intersection (The point where two lines meet or cross).

4 0
3 years ago
Using the linear combination method what is the solution to the system of linear equations 7x - 2y = -20 and 9x + 4y = -6
Ghella [55]

x should equal -2 and y should equal -3 to solve this i multiplied the first equation by 2 then got rid of the 4y and -4y then i added the 14x to the 9 equaling 23x and added the -40 to the -6 which became 23x=-46 i solved this getting -s for x, then i plugged that into the equations to get y which was -3

8 0
4 years ago
Solve for x. 3/x-1 - 1/x^-1=5/x-1<br><br> Please show all work
navik [9.2K]

3/(x-1) - 1/(x^2-1) = 5/(x-1)

Subtract 3/(x-1) from both sides

-1/(x^2-1) = 2/(x-1)

Factor x^2 - 1

-1/[(x-1)(x+1] = 2/(x-1)

Multiply by (x-1)(x+1) on both sides

-1 = 2 (x+1)

-1 = 2x + 2

Subtract 2 from both sides

-3 = 2x

Divide by 2 on both sides

-3/2 = x

5 0
3 years ago
Read 2 more answers
If a telephone pole is 25 feet tall, and a support wire connected to the top of the pole hits the ground at a 55-degree angle, h
frozen [14]

Answer:

36 feet

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Expand and simplify <br><br> A. (x – 2y)(y – 3x)<br><br> B. (2p+3)(p^2-4p-7)
emmasim [6.3K]

Answer:

A. (x−2y)(y−3x)

=(x+−2y)(y+−3x)

=(x)(y)+(x)(−3x)+(−2y)(y)+(−2y)(−3x)

=xy−3x2−2y2+6xy

=−3x2+7xy−2y2

B. (2p+3)(p2−4p−7)

=(2p+3)(p2+−4p+−7)

=(2p)(p2)+(2p)(−4p)+(2p)(−7)+(3)(p2)+(3)(−4p)+(3)(−7)

=2p3−8p2−14p+3p2−12p−21

=2p3−5p2−26p−21

Hope it helps

Please mark me as the brainliest

Thank you

5 0
2 years ago
Other questions:
  • Rochelle works part-time at the college museum, which pays her at a rate of $10 per hour. She also makes small bracelets that sh
    12·2 answers
  • Identify next three numbers in this sequence: 2, 6, 3, 9, 6, 18, 15…
    9·2 answers
  • whats 9+10?idk i cant seem to figure it out heeeeeeeeeeeeeeeeeeeeeeeeeeeelp me pleeeeeeeeeeeeeeeese. it the most hard math probe
    8·2 answers
  • Is (-5,-5)(−5,−5)left parenthesis, minus, 5, comma, minus, 5, right parenthesis a solution of y \geq -2x +4y≥−2x+4y, is greater
    9·2 answers
  • Simplify 3+(5+p) I need help nowwe
    13·1 answer
  • Write and algebraic expression for 10 less than the product of seven and F
    9·1 answer
  • Sara is playing a board game. The probability that Sara will score a point on her next turn is 1/2 . Which statement describes t
    7·1 answer
  • The coefficient of x in the expansion of<br>(x+3)(x-1) is<br>​
    9·1 answer
  • PLEASE PLEASE HELP also refer to the picture it’s more simple
    13·1 answer
  • What is the factorization of the trinomial below?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!