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SpyIntel [72]
3 years ago
13

HelpPlease!!! If s(x)= 2-x2 and t(x)=3 which value is equivalent to s•t(-7)

Mathematics
2 answers:
Shalnov [3]3 years ago
8 0

i think the answer is d

sdas [7]3 years ago
6 0

<u>Answer:</u>

The correct answer option is -439.

<u>Step-by-step explanation:</u>

We are given the following two functions and we are to find the value of ( s o t ) ( -7 ):

s ( x ) = 2 - x ^ 2 and t ( x ) = 3

(s o t)(x)=s(t(x))

(s o t)(-7)=s(t(-7))

x=-7 → t(-7)=3(-7) → t(-7)=-21

(s o t)(-7)=s(t(-7))=s(-21)

x=-21 → s(-21)=2-(-21)^2=2-441 → s(-21)=-439

(s o t)(-7)=s(t(-7))=s(-21)=-439

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Find the solution set. |x| = -4 A. { } B. {-2, 2} C. {-4, 4} D. {-16, 16}
Ray Of Light [21]

Answer:

A. { }

Step-by-step explanation:

Absolute value cannot be less than zero.

-4 < 0

There is no solution for x, ∈, R.  

Hope this helps.

6 0
3 years ago
Evaluate the line integral, where c is the given curve. C xeyz ds, c is the line segment from (0, 0, 0) to (2, 3, 4)
Arada [10]

The value of line integral is, 73038 if the c is the given curve. C xeyz ds, c is the line segment from (0, 0, 0) to (2, 3, 4)

<h3>What is integration?</h3>

It is defined as the mathematical calculation by which we can sum up all the smaller parts into a unit.

The parametric equations for the line segment from (0, 0, 0) to (2, 3, 4)

x(t) = (1-t)0 + t×2 = 2t  

y(t) = (1-t)0 + t×3 = 3t

z(t) = (1-t)0 + t×4 = 4t

Finding its derivative;

x'(t) = 2

y'(t) = 3

z'(t) = 4

The line integral is given by:

\rm \int\limits_C {xe^{yz}} \, ds = \int\limits^1_0 {2te^{12t^2}} \, \sqrt{2^2+3^2+4^2} dt

 

\rm ds = \sqrt{2^2+3^2+4^2} dt

After solving the integration over the limit 0 to 1, we will get;

\rm \int\limits_C {xe^{yz}} \, ds = \dfrac{\sqrt{29}}{12}  (e^{12}-1)   or

= 73037.99 ≈ 73038

Thus, the value of line integral is, 73038 if the c is the given curve. C xeyz ds, c is the line segment from (0, 0, 0) to (2, 3, 4)

Learn more about integration here:

brainly.com/question/18125359

#SPJ4

7 0
2 years ago
Math please help me thank you :)
Pavlova-9 [17]
I think your answer is ( B )
5 0
2 years ago
In a room, there are 450 students of which 20% are girls. A group of students have mobile phones with them, of which 40% are gir
andrew-mc [135]

Answer:

216 boys

Step-by-step explanation:

450 students: 20% girls, 80% boys

450*20%=90 girls

450*80%=360 boys

Students having mobile phones: 40% (OF THE 90) girls, 60% (OF THE 360) boys

90*40%=36 girls

360*60%=216 boys

[We honestly don't need to care about the girls without mobile phones as they are only asking how many boys have mobile phones]


4 0
3 years ago
Read 2 more answers
Please answer this quick
Darya [45]

(3x + 20degrees )  = 180degrees

180 degress because a stranight angle equals that

3 0
2 years ago
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