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
lina2011 [118]
3 years ago
7

Issac tosses a quarter off of a bridge, creating the shape of a parabola. The parabola can be represented by the equation h=-16t

^2-4t+20
c. How high is the coin after .25 seconds?

d. After how many seconds does it land on the ground?
Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
4 0

Answer:

Step-by-step explanation:

a) the equation representing the parabola is expressed as

h = -16t² - 4t + 20

c) to determine the height after 25 seconds, we would substitute 25 for t into the given equation. It becomes

h = -16(25)² - 4(25) + 20

h = - 10000 - 100 + 20

h = - 10080

d) when the coin lands on the ground, the height would be 0. Therefore,

-16t² - 4t + 20 = 0

Dividing both sides of the equation by 4, it becomes

- 4t² - t + 5 = 0

- 4t² - 5t + 4t + 5 = 0

- t(4t + 5) + 1(4t + 5) = 0

- t + 1 = 0 or 4t + 5 = 0

t = 1 or t = - 5/4

Since t cannot be negative, then t = 1 second

You might be interested in
What is the effect on the graph of the function f(x) = |x| when f(x) is changed to f(x + 9)?
babymother [125]
The answer is A) shifts right by 9 units


3 0
3 years ago
Read 2 more answers
A soccer balls outer covering is made by stitching together 12 regular pentagons and 20 regular hexagons both regular polygons h
KengaRu [80]
Http://www.madeiracityschools.org/userfiles/376/Classes/17052/Review%20Worksheet%20Unit%209%20Quiz%2... 

I would use this website. Hope it helps!
7 0
3 years ago
Solve the liner equation <br> 17-x=1/2(15)+6
Genrish500 [490]

Answer:

x = 3.5

Step-by-step explanation:

15(1/2) = 7.5

7.5+6 =13.5

subtract 17 and divide by -1 to isolate x 13.5-17/-1

x = 3.5

8 0
3 years ago
How do I use the substitution method to find the point of intersection of
Goshia [24]
To substitute, solve for one variable and then plug it into the other equation you have. In this problem, y is already solved for on the top equation (y=x+2), so you just stuff it into the second equation.

y = x + 2
3y = 4x - 2

3(x + 2) = 4x - 2
3x + 6 = 4x - 2
-x = -8
x = 8
y = x + 2 = 8 + 2 = 10

solution:
x = 8 
y = 10

hope this helps!! :)
7 0
3 years ago
Please help. the question is in the picture.
Harlamova29_29 [7]

We have measures of all tree sides of the both triangles,

so we can use SSS to check if the triangles are similar.

|ED|/|AB| =5/10=1/2

|DC|/|BC| = 4/8 = 1/2

|EC|/|AC| = 6/12 = 1/2

We see that all tree pairs are in proportion, so these triangles ΔABC and ΔEDC are similar.

We have enough information to prove that ΔABC similar to ΔEDC.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Multiply 1/2 x 3/16​
    13·2 answers
  • Help me !!!!!!!!!!!!!!
    14·1 answer
  • During the shot put event, Alayna throws the ball 32.45 feet while her teammates throw 28.34 feet, 26.59 feet, and 33.11 feet. U
    13·2 answers
  • 3. The product of 7/10 and another factor
    11·1 answer
  • Which equation could be a solution for (1, 3)?
    8·1 answer
  • A car is purchased for $25,500. After each year, the resale value decreases by 30%. What will the resale value be after 3 years?
    11·1 answer
  • A metal rod will be cut into pieces that are each 1/20 meters long. The rod is 4/5 meters long. How many pieces will be made fro
    9·1 answer
  • If you run 4 1/2 miles in three quarter of an hour, how many miles would you run in two thirds
    10·1 answer
  • The jet stream is traveling nearly due south from Wyoming to Colorado at 110 knots. If the plane’s speed is 400 knots, what will
    13·1 answer
  • I need help answering this question for my math homework. for the first select the option is yes or no and for the second select
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!