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
kati45 [8]
3 years ago
14

F (4)=-3×^2-2 g (×)=-2×+2 find f (4) and g (7)

Mathematics
1 answer:
Oksana_A [137]3 years ago
7 0
I'm pretty sure you meant:
f(x) = -3x^2-2
g(x) = -2x+2

To evaluate a function at a certain value, you just have to plug that certain value into the function. Basically, replace all x's with the one given. Let's do f(x) first:
f(4) = -3(4)^2-2=-3(16)-2 = -48-2 = -50

So, for f(x), your answer is -50.

Let's do the exact same thing for g(x):
g(7) = -2(7)+2 = -14+2 = -12

Your answer for g(x) is -12. 


Hopefully, this makes sense!
You might be interested in
CAN SOMEONE PLEAAE HELP ME ASAP ILL MARK BRAINLIST!!!! PLEASE
kramer
The answer is 1753...
3 0
3 years ago
Read 2 more answers
Surface integrals using an explicit description. Evaluate the surface integral \iint_{S}^{}f(x,y,z)dS using an explicit represen
Jobisdone [24]

Parameterize S by the vector function

\vec r(x,y)=x\,\vec\imath+y\,\vec\jmath+f(x,y)\,\vec k

so that the normal vector to S is given by

\dfrac{\partial\vec r}{\partial x}\times\dfrac{\partial\vec r}{\partial y}=\left(\vec\imath+\dfrac{\partial f}{\partial x}\,\vec k\right)\times\left(\vec\jmath+\dfrac{\partial f}{\partial y}\,\vec k\right)=-\dfrac{\partial f}{\partial x}\vec\imath-\dfrac{\partial f}{\partial y}\vec\jmath+\vec k

with magnitude

\left\|\dfrac{\partial\vec r}{\partial x}\times\dfrac{\partial\vec r}{\partial y}\right\|=\sqrt{\left(\dfrac{\partial f}{\partial x}\right)^2+\left(\dfrac{\partial f}{\partial y}\right)^2+1}

In this case, the normal vector is

\dfrac{\partial\vec r}{\partial x}\times\dfrac{\partial\vec r}{\partial y}=-\dfrac{\partial(8-x-2y)}{\partial x}\,\vec\imath-\dfrac{\partial(8-x-2y)}{\partial y}\,\vec\jmath+\vec k=\vec\imath+2\,\vec\jmath+\vec k

with magnitude \sqrt{1^2+2^2+1^2}=\sqrt6. The integral of f(x,y,z)=e^z over S is then

\displaystyle\iint_Se^z\,\mathrm d\Sigma=\sqrt6\iint_Te^{8-x-2y}\,\mathrm dy\,\mathrm dx

where T is the region in the x,y plane over which S is defined. In this case, it's the triangle in the plane z=0 which we can capture with 0\le x\le8 and 0\le y\le\frac{8-x}2, so that we have

\displaystyle\sqrt6\iint_Te^{8-x-2y}\,\mathrm dx\,\mathrm dy=\sqrt6\int_0^8\int_0^{(8-x)/2}e^{8-x-2y}\,\mathrm dy\,\mathrm dx=\boxed{\sqrt{\frac32}(e^8-9)}

5 0
3 years ago
Prove that the sum of ab and ba is divisible by the sum of a and b
Likurg_2 [28]

Answer:

It is divisible by 11 and (a + b) !

Step-by-step explanation:

Given a two digit number $ ab $, the digits written in reverse order is $ba $.

Note that a two digit number ab  = 10a + b.

For example: 24 = 10(2) + 4

Similarly, ba = 10(b) + a

Now, the sum of the numbers ab and ba = 10a + b + 10b + a

= 11a + 11b

= 11(a + b)

Hence, the sum of any two digit number ab and the reverse of the number ba,  is divisible by 11 and (a + b).

Hence, proved.

5 0
3 years ago
Find the unknown measures. Round lengths to the nearest hundredth and angle measures to the nearest degree.
MatroZZZ [7]
The answer is AB= 4.62; mA= 22; mB=68
You could quickly find the answer by just using Pythagorean theorem to find AB.
4.3^2 +1.7^2 = AB^2
5 0
3 years ago
OLZ HELP ILL MARK AS BRAINLEST​
Airida [17]

Answer:

-2

Step-by-step explanation:

The slope is rise over run. If we look at the points we can see the rise is -2 and the run is 1. -2/1 = -2, so my answer is correct.

4 0
2 years ago
Read 2 more answers
Other questions:
  • Two fifths of the students in your class are in the band. Of these, one fourth play the saxophone. If there are 30 students in y
    6·2 answers
  • There are 32 students in Jenny's class. If the teacher randomly picks a student to call on, what is the probability that Jenny w
    6·1 answer
  • Assume that ∠A  is an acute angle. If sin A = 0.994, use a calculator to find the measure of ∠A to two decimal places.   The mea
    10·1 answer
  • Store ABC sells 8 lbs. of oranges for $6.00. Store XYZ sells 14 lbs. or oranges for $11.20. Which store is less expensive, and b
    7·1 answer
  • A teacher has 40 learners in her class. She chooses 1% to clean her board. Is this possible?​
    12·1 answer
  • Put these numbers in order from greatest to least.
    15·2 answers
  • What is 35 x 5 <br><br> thnnxxxx
    10·2 answers
  • Can you help me with explanation will give brainiest
    14·1 answer
  • Tyler is shooting 65% from the free
    13·1 answer
  • What is the measurement of Angle x. please explain​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!