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
STatiana [176]
3 years ago
13

The fuel economy of a car, measured in miles per gallon, is modeled by the function ƒ(s) = –0.009s2 + 0.699s + 12 where s repres

ents the speed of the car, measured in miles per hour. What's the fuel economy of the car when it travels at an average of 20 miles an hour?
Mathematics
2 answers:
notsponge [240]3 years ago
8 0

Answer:

22.38 miles per gallon is the fuel economy of the car.

Step-by-step explanation:

The fuel economy of the car is modeled by the function f(s) = -0.009s² + 0.699s + 12

Where s = speed of the car measured in miles per hour.

Now we have to find the fuel economy of the car when it travels at an average of 20 miles an hour.

Now we plug in the value of s = 20 miles per hour in the given function

f(20) = -0.009(20)² + 0.699(20) + 12

       = -3.6 + 13.98 + 12

       = 22.38 miles per gallon

Therefore, at the speed of 20 miles and hour fuel economy of the car will be 22.38 miles per gallon.

valina [46]3 years ago
7 0

25.62= -.009(20*2)+ .699(20)+12


You might be interested in
Factor completely 49x2 − 81. <br> a. (7x 9)2 <br> b. (7x − 9)2 <br> c. (7x 9)(7x − 9) <br> d. 7x − 9
vredina [299]
Use the property
(a -b)(a+ b) = a^2 - b^2

49x^2 - 81 = (7x + 9)((7x - 9)
3 0
3 years ago
Read 2 more answers
3x^2+11x+6 in factor form
Novosadov [1.4K]

Answer: (3x+2)(x+3)

Step-by-step explanation: Factor by grouping.

I hope this helps you out.

8 0
3 years ago
Read 2 more answers
Solve for x: x^2-2x=15
Lyrx [107]

Answer:

<h2>x = 5 , x = -3</h2>

Step-by-step explanation:

x^2 - 2x = 15

x^2 - 2x - 15 = 15 - 15          (Subtract 15 from both sides.)

x^2 - 2x -15 = 0                   (Simplify.)

<em />

<em>Set up & solve for a quadratic formula</em>

<h3><em>* I will solve for your first x</em></h3>

2 + root 64 / 2x 1   =   2 + root 64 / 2

root 64 = 8

= 2 + 8 / 2

= 10 / 2

= 5

<em>To solve for the second, follow the same pattern/formula for the first that I used to get 5.</em>

5 0
3 years ago
Mike hiked to a lake in 5.5 hours at an average rate of 2 1/5 miles per hour. Pedro hiked the same distance at a rate of 2 3/5 m
Leni [432]

Answer:

3.5 hours*3.25 mph=11.375 miles

11.375 miles/3.45 mi/hr=3.297 hours or 3.30 hours, about 12 minutes faster.

Step-by-step explanation:

6 0
3 years ago
At a basketball game, members of the Spirit Club use a t-shirt cannon to launch team t-shirts to spectators in the stands. The e
fiasKO [112]
The initial velocity is 90 ft/sec 
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following have two congruent parallel bases?
    5·1 answer
  • 7p+8p-12=59 ( find the p)
    7·2 answers
  • Robbie had p coins. Then he found 59 more coins in a drawer. Choose the expression that shows how many coins Robbie has now.
    11·1 answer
  • Is 6 divisible by 36
    10·2 answers
  • For each expression use a property to write an equivalent expression. Tell which property you used.
    15·1 answer
  • Heeeeeeeeeeeeeeeeeeeeeeeeeeeeelelllllllllllllpppppppppppppppp
    7·1 answer
  • URGENT!!! <br> Can someone please answer these 2 questions and show the working out?
    8·1 answer
  • The water slide is 130 meters from the top to bottom. The vertical height of the slide is 50 meters. What is the angle of elevat
    8·1 answer
  • Compare the two groups of data. Which statement is true?
    12·1 answer
  • Please help.. Please. Is this a positive trend or negative trend or no trend ​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!