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
bearhunter [10]
3 years ago
14

Which expression is equivalent to 18+ r x r x r ?

Mathematics
1 answer:
Molodets [167]3 years ago
8 0

Answer:

none of them. The actual answer is 18+r^3

You might be interested in
An electric current, I, in amps, is given by I=cos(wt)+√8sin(wt), where w≠0 is a constant. What are the maximum and minimum valu
exis [7]
Take the derivative with respect to t
- w \sin(wt) + \sqrt{8} w cos(wt)
the maximum and minimum values occur when the tangent line is zero so we set the derivative to zero
0 = -w \sin(wt) + \sqrt{8} w cos(wt)
divide by w
0 =- \sin(wt) + \sqrt{8} cos(wt)
we add sin(wt) to both sides

\sin(wt)= \sqrt{8} cos(wt)
divide both sides by cos(wt)
\frac{sin(wt)}{cos(wt)}= \sqrt{8}   \\  \\ arctan(tan(wt))=arctan( \sqrt{8} ) \\  \\ wt=arctan(2 \sqrt{2)} OR\\ wt=arctan( { \frac{1}{ \sqrt{2} } )
(wt)=2(n*pi-arctan(2^0.5))
(wt)=2(n*pi+arctan(2^-0.5))
where n is an integer
the absolute max and min will be

I=cos(2n \pi -2arctan( \sqrt{2} ))
since 2npi is just the period of cos
cos(2arctan( \sqrt{2} ))= \frac{-1}{3} 

substituting our second soultion we get
I=cos(2n \pi +2arctan( \frac{1}{ \sqrt{2} } ))
since 2npi is the period
I=cos(2arctan( \frac{1}{ \sqrt{2}} ))= \frac{1}{3}
so the maximum value =\frac{1}{3}
minimum value =- \frac{1}{3}


4 0
3 years ago
What are the roots of the equation 2x2<br> 13x + 25 = 0 in simplest a + bi form?
butalik [34]
13x+25=0
13x+25-25=0-25 Since two opposites added give zero, remove them from the expression 13x=-25
8 0
3 years ago
Math workshops and final exams: The college tutoring center staff are considering whether the center should increase the number
ludmilkaskok [199]

Answer:

2. Number of workshops attended.

Step-by-step explanation:

The variable of interest for predicting the final exam score and doing regression analysis is workshop attendance.  Therefore, the response variable should be the number of workshops attended by each student.

This also agrees with what the college tutoring center staff are considering, which forms the research question: "should the center increase the number of math workshops they offer to help students improve their performance in math classes?"

3 0
3 years ago
Pleasseee helllp meeee​
Alja [10]

Answer:

The third one

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
HELP PLEASE! 50 POINTS, WILL MARK BRAINLIEST WHOEVER IS FIRST!
Temka [501]

95

Step-by-step explanation:

she would have to get At Least 95 or better to balance it out

4 0
3 years ago
Other questions:
  • What is the value of x in the equation x – y = 30, when y = 15?
    9·2 answers
  • 2x-3y=0
    6·1 answer
  • I have 24 sunflowers in a container Miss Mason buys one fourth of the flower mr. Kim buice one-third of the flowers some flowers
    5·2 answers
  • What is the value of xy over z if x =-2 y=-3 and z=4
    14·2 answers
  • 12. What is scorched-earth policy?
    8·1 answer
  • A right triangle has legs measuring 4.5 meters and 1.5 meters. The lengths of the legs of a second triangle are proportional to
    15·1 answer
  • Find the product of −35∙−1.5
    8·1 answer
  • Pls help with the right answer pls thx :D. Find m
    6·1 answer
  • In math class alyssa’s test score is 90.125
    9·1 answer
  • 9029<br> 2066<br> 10<br> 4<br> -6-54-3-2-12- 2 3 4 5 6 x<br> -f(x)<br> -6<br> -8<br> -10<br> -12+
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!