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
goldfiish [28.3K]
3 years ago
8

A car is driven on a straight track such that its displacement from the starting point is given as x = t + 2t2. What is the aver

age velocity (average rate of change of displacement) of the car between t = 2s and t = 4s?
Mathematics
1 answer:
11111nata11111 [884]3 years ago
4 0
Average velocity = (x(4) - x(2))/(4 - 2) = ((4 + 2(4)^2) - (2 + 2(2)^2))/2 = ((4 + 2(16)) - (2 + 2(4)))/2 = ((4 + 32) - (2 + 8))/2 = (36 - 10)/2 = 26/2 = 13m/s.
You might be interested in
Jeremy buys 2 sweaters for $18 each. He can use only one of the following coupons:
katen-ka-za [31]

Jeremy should use coupon 2 because when you multiply both the sweaters (36) by .25 you get 9, and then you subtract 36 by 9 which is 27.

But when you use coupon 1 you multiply 18 by .40 which is 7.20 where you subtract 18 by 7.20 which is 10.80. You then add 10.80 with 18 which is 28.80.

I don't even know what the question is but I found the same problem and this was the answer

7 0
3 years ago
Salma received a $70 gift card for a coffee store. She used it in buying some coffee that cost $7.61 per pound. After buying the
rosijanka [135]

Answer:

4

Step-by-step explanation:

Amount spent on coffee = 70 - 39.56 = 30.44

One pound costs 7.61, how many will cost 30.44

7.61 : 1 = 30.44 : X

7.61 = 30.44/X

X = 30.44/7.61

X = 4

7 0
3 years ago
Read 2 more answers
At the beginning of spring, Caroline planted a small sunflower in her
elixir [45]

Answer:

After 10 weeks: 40 inches

Step-by-step explanation:

Equation

15 + 2.5w = h

15 = beginning height

2.5 = rate per week

w = weeks passed

h = total height

8 0
3 years ago
Find the length of a side of the<br> square shown below.<br> х<br> 6V2<br> X =<br> x = [?]
Leona [35]

Answer:

x=6

Step-by-step explanation:

In a square, its angles are all 90 degrees. So, cutting a square in half into two triangles from corner to corner produces 45 degree angles on both sides. Since the triangles are now 45-45-90 triangles, we can use the rule where the hypotenuse of the triangle is equal to the square root of 2 times the length of either side. So, the side length is 6.

4 0
3 years ago
9. Draw the number line graph of 0.4.
Evgesh-ka [11]
The number line graph of 0.4 is here.

4 0
4 years ago
Other questions:
  • You want to make 3 pairs of earrings that are in the shape of isosceles triangles. Each earring will have a base of 2 cm. the wi
    5·1 answer
  • Hello There!! I need help in this question...Use the interactive graph to plot each set of points. Which sets represent proporti
    12·2 answers
  • The graph contains the points (-3,-2) and (3,0)<br><br> Help please!!
    10·1 answer
  • Suppose a population has a mean of 7 for some characteristic of interest and a standard deviation of 9.6. A sample is drawn from
    14·1 answer
  • Based on the output when testing to see if the population mean heart rate of UK students is not equal to 80, identify the follow
    11·1 answer
  • Need answer this urgent and fast
    14·1 answer
  • Please help! Need answer asap
    10·1 answer
  • PLEASSSsSEEeeE HeLPpPp
    11·1 answer
  • Ayo people good at math
    6·2 answers
  • What is the image of the point (2, 1) after reflection over the line x=-2
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!