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
natita [175]
3 years ago
5

To get to work Sam jogs 3 kilometers to the train, then rides the remaining 5 kilometers. If the train goes 40 km per hour faste

r than Sam’s constant rate of jogging and the entire trip takes 30 minutes, how fast does Sam jog?
Mathematics
2 answers:
Deffense [45]3 years ago
7 0

Answer: D on edge:)

Step-by-step explanation:

cupoosta [38]3 years ago
4 0
Let
r = Sam's jogging rate
r+40 = train's rate

The rate refers to a speed of any moving body.
Know first the relationship of distance, time, and rate. The time is the distance divided by the rate.
By analyzing the problem, the time for Sam and the time for train have the total time of 30 minutes or 1/2 hours. Expressing it into an equation yields
t(Sam) + t(train) = 1/2 hours
The distance covered by Sam is 3 km, and the distance covered by train is 5 km. So
3/s + 5/(s+40) = 1/2
Solving for s,
3(s+40) + 5s = (1/2)*(s(s+40))
3s + 120 + 5s = (1/2)s<span>² + 20s
8s + 120 = (1/2)s</span><span>² + 20s
(1/2)s</span><span>² + 12s - 120 = 0

The solution is turned out into a quadratic equation. If you know the quadratic formula, you get for x, for instance the two values of x are
s = 7.59 and s = -31.59

The value s = -31.59 is meaningless. Therefore Sam's jogging rate is 7.59 km/hr.</span>
You might be interested in
1. What is the definition of function?
BaLLatris [955]
It’s A B C and D
They are all correct
5 0
3 years ago
What is the positive square root of 6,400?
tia_tia [17]

Answer:

80 is the positive square root of 6400

Step-by-step explanation:

5 0
3 years ago
What is (2x)(X). You are multiplying 2x by x.
AnnZ [28]
Your answer would be 2x^2. Multiplying an x by an x makes it a squared variable.
7 0
3 years ago
Read 2 more answers
There are 400 seats in the Jefferson Middle School auditorium. The students are using 35 of the seats. There are 65 seats being
jolli1 [7]

Answer:

300

Step-by-step explanation:

400 - 35 - 65 = 300

100 seats being used, so 300 seats left unused

(Btw, do you happen to know of a certain Northeast Middle School at all?)

6 0
3 years ago
7. A large population of ALOHA users manages to generate 60 requests/s, including originals and retransmissions. Time is slotted
Debora [2.8K]

Answer:

P(success at first attempt) = 0.1353

Step-by-step explanation:

This question follows poisson distribution. Thus, the formula is;

P(k) = (e^(-G) × (G)k)/k!

where;

G is number of frames generated in one frame transmission time(or frame slot time)

Let's find G.

To do this, we need to find number of frames generated in 1 slot time which is given as 50 ms.

Now, in 1000 ms, the number of frames generated = 50

Thus; number of frames generated in 50 ms is;

G = (50/1000) × 50

G = 2.5

To find the chance of success on the first attempt will be given by;

P(success at first attempt) = P(0) = e^(-G) = e^(-2) = 0.1353

8 0
3 years ago
Other questions:
  • Simplify the expression 6t+3 (1−2t) −5.
    6·1 answer
  • describe why it might not be a good idea to use a key where each symbol stands or 1 in a picture graph.
    11·1 answer
  • Solve All Of Them Please
    7·1 answer
  • Hurry please!!! i have to go but i have to get my mth done like right know i only have 3 more question so here is 1/3 please ple
    5·2 answers
  • Help please uwuwuuwuwwuwuwuuwwuwuuwu
    5·2 answers
  • Lauren invested $340 in an account paying an interest rate of 5.8% compounded monthly. Assuming no deposits or withdrawals are m
    10·1 answer
  • Which of the following could be the areas of the three squares shown?
    9·2 answers
  • 15 people working 5 hours per day can make 30 units of a product in 10 days. Assuming all other factors remaining
    5·2 answers
  • Need help with my homework plz
    7·2 answers
  • Determine the equation of the line that is parallel to the given line, through the given point
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!