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
fgiga [73]
3 years ago
6

Find the derivative of f(x) = 2x2 + 7x at -3. That is, find f'(-3).

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
5 0

Answer:

Hello,

f'(-3) = -5

Step-by-step explanation:

f'(x) = 4 x + 7

f'(-3) = 4 (-3) + 7 = -12 + 7 = -5

or

f(-3) = 2 (-3)² + 7 (-3) = 18 - 21 = -3

f(-3 + h) = 2 (-3 + h)² + 7 (-3 + h)

= 2 (9 - 6h + h²) - 21 + 7h

= 18 - 12h + 2h²  - 21 + 7h

= 2h² - 5h - 3

( f(-3 + h) - f(-3) ) / h = 2h - 5

f'(-3) = lim h→0 ( f(-3 + h) - f(-3) ) / h = lim h→0 (2h - 5) = -5

You might be interested in
Flip a coin 10 times and record the observed number of heads and tails. For example, with 10 flips one might get 6 heads and 4 t
zepelin [54]

Answer:

The greater the sample size the better is the estimation. A large sample leads to a more accurate result.

Step-by-step explanation:

Consider the table representing the number of heads and tails for all the number of tosses:

Number of tosses    n (HEADS)        n (TAILS)            Ratio

            10                         3                      7                    3 : 7

           30                         14                    16                   7 : 8

          100                        60                   40                  3 : 2

Compute probability of heads for the tosses as follows:

  • n = 10 tosses

        P(\text{HEADS})=\frac{3}{10}=0.30

The probability of heads in case of 10 tosses of a coin is -0.20 away from 50/50.

  • n = 30 tosses

        P(\text{HEADS})=\frac{14}{30}=0.467

The probability of heads in case of 30 tosses of a coin is -0.033 away from 50/50.

  • n = 100 tosses

        P(\text{HEADS})=\frac{60}{100}=0.60

The probability of heads in case of 100 tosses of a coin is 0.10 away from 50/50.

As it can be seen from the above explanation, that as the sample size is increasing the distance between the expected and observed proportion is decreasing.

This happens because, the greater the sample size the better is the estimation. A large sample leads to a more accurate result.

5 0
3 years ago
Alejandro Juarez is paid $829 every two weeks. How much would Alejandro earn in 4 weeks ?
aev [14]

Answer:

$1,658 in 4 weeks

Step-by-step explanation:

Since we are working in intervals of 2, we can just multiply.

829 * 2

1658

Best of luck!

6 0
3 years ago
Read 2 more answers
Hayley picked 2/3 of a pound of
Ksenya-84 [330]
The answer the this is 0.23 pounds per container
8 0
2 years ago
Tissues of living organisms consist primarily of organic compounds; that is, they contain carbon molecules known as proteins, ca
Marianna [84]
<span>A healthy human body is approximately 18% carbon, so to determine how many pounds of carbon a 200lb body contains, compute 200lbs X 0.18 = 36 pounds. To convert 36lbs to kilograms, multiply by the conversion factor 0.454. Therefore, 36lbs X 0.454 = 16.344 kg.</span>
6 0
3 years ago
Read 2 more answers
Terri Clifford bought a Sunday dress for $36. The sales tax was 6%. Find the total cost of the dress.
Kipish [7]
Total cost is $38.16

Multiply 36 by 0.06 (2.16)
Add 2.16 to 36 (38.16)
6 0
3 years ago
Read 2 more answers
Other questions:
  • 3 friends share 7 cookies equally how much cookies does each friend get
    12·2 answers
  • The legs of a triangle measure 8 cm and
    10·1 answer
  • Zamiyah is working on her summer playlist for the bus ride to Lake Placid. The ride is 300 minutes long. She already has 115 min
    13·1 answer
  • What is 309,099,990 in standard form
    15·1 answer
  • Nick score on six scientist are listed below 87,93,82,91,93,85
    15·1 answer
  • The perimeter of a rectangle is 56 inches. The length is 4 more than twice the width. Write and solve a system to determine the
    9·2 answers
  • Identify the coefficient in the following expression 6a +7​
    7·1 answer
  • Could someone please help
    11·2 answers
  • Help I have a C in math. I don't understand this Alegbra. If you get it right then I will give you Brainlist!​
    7·2 answers
  • How do I get this problem started
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!