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
nika2105 [10]
3 years ago
7

If f(x) = 2x 2 + 3, find f(3). 31 15 21 39

Mathematics
2 answers:
Westkost [7]3 years ago
7 0
21 is the right answer goodluck
Mekhanik [1.2K]3 years ago
4 0

Answer: 21

Step-by-step explanation:

We are given a function f(x) = 2x^2 + 3

To find the value of f(3), we need to substitute x=3 in the given function, we get

f(3) = 2(3)^2 + 3\\\\\Rightarrow\ f(3)=2(9)+3..............[\text{Since}\ 3^2=9]\\\\\Rightarrow\ f(x)=18+3..............[\text{Since}\ 2\times9=18]\\\\\Rightarrow\ f(x)=21..........[\text{Addition property}]

Hence, the value of f(3) = 21.

You might be interested in
2(3p-6)+ 4p what is the answer for this
trasher [3.6K]

Answer:

10−12

Step-by-step explanation:

8 0
3 years ago
Give each trig ratio as a fraction in simplest form
Volgvan
Sin D is 21/29
cos D is 20/29
tan D is 21/20
sin E 20/29
cos E is 21/29
tan E is 20/21

sin is y/r
cos is x/r
tan is y/x

Two different perspectives of the triangle, D and E.
5 0
3 years ago
g Suppose you wish to perform a hypothesis test for a population mean. Suppose that the population standard deviation is known,
NikAS [45]

Answer:

z-test.

Step-by-step explanation:

We want to perform an hypothesis test for a population mean.

In the case that the <u>standard deviation of the population is known</u> and the population distribution is normal, even if the sample is small, <u>we will use a z-test</u>.

The usual case is to not know the standard deviation of the population, in which case a t-test is adequate instead of a z-test, taking into account the degrees of freedom of the sample.

5 0
3 years ago
51.75 as a mixed number
Vikentia [17]
51 3/4....................
6 0
3 years ago
Find the diameter of a circle with a circumference of 443 feet. Use 3.14 for pi.
marishachu [46]

Answer:

\huge\boxed{\sf d = 141\ feet}

Step-by-step explanation:

<u>Given Data:</u>

Circumference = C = 443 ft

<u>Required:</u>

Diameter = d = ?

<u>Formula:</u>

d = C / π

<u>Solution:</u>

d = 443 / 3.14

d = 141.0 feet

d = 141 feet

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
3 0
2 years ago
Read 2 more answers
Other questions:
  • If a standard six sided die is rolled over, what is the probability that the number rolled is either an even or a multiple of 3.
    13·1 answer
  • Which sentence is punctuated correctly
    10·2 answers
  • After how many places the decimal expansion of 13/40 will terminate?
    6·1 answer
  • Help I need somebody help
    14·1 answer
  • Leonard it sells small watermelons for seven dollars each and large watermelons for $10 each one day the number of small waterme
    14·1 answer
  • A triangle is placed in a semicircle with a radius of 6 yd, as shown below. Find the area of the shaded region.
    15·1 answer
  • A test for tuberculosis was given to 1000 subjects, 8% of whom were known to have tuberculosis. For the subjects who had tubercu
    12·1 answer
  • 2p&lt;6 i need help plsss i need it before 9:30
    12·1 answer
  • HELP!
    15·1 answer
  • 20POINTS Given colon g (x) = StartRoot x minus 4 EndRoot and h (x) = 2 x minus 8. What is g(h(10))?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!