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
Vanyuwa [196]
3 years ago
8

What is the value of 7x^2 + 3x + 4 when x=2?

Mathematics
2 answers:
Nonamiya [84]3 years ago
8 0

Answer:

38

Step-by-step explanation:

substitute the value of the variable into an equation, then simplify

DerKrebs [107]3 years ago
3 0

Answer:

38

Step-by-step explanation:

To find the value of 7x^2 + 3x + 4 when x=2. We have to plug in x. So plugging x in, we have

7(2)^2 +3(2) +4

and this becomes

7(4) + 6 +4

or

8(4)+6

which is 38

You might be interested in
Let X ~ N(0, 1) and Y = eX. Y is called a log-normal random variable.
Cloud [144]

If F_Y(y) is the cumulative distribution function for Y, then

F_Y(y)=P(Y\le y)=P(e^X\le y)=P(X\le\ln y)=F_X(\ln y)

Then the probability density function for Y is f_Y(y)={F_Y}'(y):

f_Y(y)=\dfrac{\mathrm d}{\mathrm dy}F_X(\ln y)=\dfrac1yf_X(\ln y)=\begin{cases}\frac1{y\sqrt{2\pi}}e^{-\frac12(\ln y)^2}&\text{for }y>0\\0&\text{otherwise}\end{cases}

The nth moment of Y is

E[Y^n]=\displaystyle\int_{-\infty}^\infty y^nf_Y(y)\,\mathrm dy=\frac1{\sqrt{2\pi}}\int_0^\infty y^{n-1}e^{-\frac12(\ln y)^2}\,\mathrm dy

Let u=\ln y, so that \mathrm du=\frac{\mathrm dy}y and y^n=e^{nu}:

E[Y^n]=\displaystyle\frac1{\sqrt{2\pi}}\int_{-\infty}^\infty e^{nu}e^{-\frac12u^2}\,\mathrm du=\frac1{\sqrt{2\pi}}\int_{-\infty}^\infty e^{nu-\frac12u^2}\,\mathrm du

Complete the square in the exponent:

nu-\dfrac12u^2=-\dfrac12(u^2-2nu+n^2-n^2)=\dfrac12n^2-\dfrac12(u-n)^2

E[Y^n]=\displaystyle\frac1{\sqrt{2\pi}}\int_{-\infty}^\infty e^{\frac12(n^2-(u-n)^2)}\,\mathrm du=\frac{e^{\frac12n^2}}{\sqrt{2\pi}}\int_{-\infty}^\infty e^{-\frac12(u-n)^2}\,\mathrm du

But \frac1{\sqrt{2\pi}}e^{-\frac12(u-n)^2} is exactly the PDF of a normal distribution with mean n and variance 1; in other words, the 0th moment of a random variable U\sim N(n,1):

E[U^0]=\displaystyle\frac1{\sqrt{2\pi}}\int_{-\infty}^\infty e^{-\frac12(u-n)^2}\,\mathrm du=1

so we end up with

E[Y^n]=e^{\frac12n^2}

3 0
3 years ago
Camila and Evelyn work at a dry cleaners ironing shirts.Camila can iron 40 shirts per hour, and Evelyn can iron 20 shirts per ho
GalinKa [24]
60 shirts can be ironed per hour with two workers
8 0
3 years ago
Read 2 more answers
Helppp 100pts
frosja888 [35]

Answer:

.83

Step-by-step explanation:

If you take 100 shows 60 shows got favorable response and in that 50 shows were successful.

So probability for a show to be successful if it got a favorable response is = 50/60 = 0.83

8 0
4 years ago
Please answer quickly!!!!! Will give the brainiest There is a pic attached.
Alexeev081 [22]

Answer:

A. 2/3

Step-by-step explanation:

There are 12 tiles in total, and 8 tiles with numbers that are greater than 4.

Express this as a fraction:

8/12

Simplify:

2/3  

Hope this helps

5 0
3 years ago
Which example is an inherited trait?
Eva8 [605]
Eye color is an inherent trait
4 0
2 years ago
Read 2 more answers
Other questions:
  • 1) A farm has chickens and cows. You ask the farmer how many chickens he has, and how many cows he has. The farmer tells you he
    12·1 answer
  • Will the product be more or less than 9 8/9
    14·2 answers
  • A bakery bakes 23 batches of 51 cupcakes each week. How many individual cupcakes do they make each week?
    15·2 answers
  • Please Help!! 15 points!!!!<br><br> Create a real world situation for -8 + (-12) and solve
    6·1 answer
  • Are the lines parallel, perpendicular, or neither ? 3y=-x 3x=y
    10·1 answer
  • Perimeter: _____<br> Area: _____
    6·2 answers
  • Can someone please tell me the area of the square
    6·1 answer
  • PLEASE HELP (30 POINTS)
    14·1 answer
  • Whats your zodiac sign first to answer gets brailiest and 100 points
    7·1 answer
  • What is the solution To the system of equations below? Need answer ASAP please
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!