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
Gala2k [10]
2 years ago
7

Please help I will give brainlyiest fast please help fast

Mathematics
1 answer:
lana [24]2 years ago
5 0

Answer:

  • A. 49.

Step-by-step explanation:

<u>Given equation:</u>

  • -11 2/3 * (-4 1/5)

<u>Simplify, then solve:</u>

  • -11 2/3 * (-4 1/5)
  • = -35/3 * (-21/5)
  • = \frac{-35 * (-21)}{3 * 5}
  • = 735/15
  • = 49.

Your answer is A. 49.

You might be interested in
Use the Chain Rule (Calculus 2)
atroni [7]

1. By the chain rule,

\dfrac{\mathrm dz}{\mathrm dt}=\dfrac{\partial z}{\partial x}\dfrac{\mathrm dx}{\mathrm dt}+\dfrac{\partial z}{\partial y}\dfrac{\mathrm dy}{\mathrm dt}

I'm going to switch up the notation to save space, so for example, z_x is shorthand for \frac{\partial z}{\partial x}.

z_t=z_xx_t+z_yy_t

We have

x=e^{-t}\implies x_t=-e^{-t}

y=e^t\implies y_t=e^t

z=\tan(xy)\implies\begin{cases}z_x=y\sec^2(xy)=e^t\sec^2(1)\\z_y=x\sec^2(xy)=e^{-t}\sec^2(1)\end{cases}

\implies z_t=e^t\sec^2(1)(-e^{-t})+e^{-t}\sec^2(1)e^t=0

Similarly,

w_t=w_xx_t+w_yy_t+w_zz_t

where

x=\cosh^2t\implies x_t=2\cosh t\sinh t

y=\sinh^2t\implies y_t=2\cosh t\sinh t

z=t\implies z_t=1

To capture all the partial derivatives of w, compute its gradient:

\nabla w=\langle w_x,w_y,w_z\rangle=\dfrac{\langle1,-1,1\rangle}{\sqrt{1-(x-y+z)^2}}}=\dfrac{\langle1,-1,1\rangle}{\sqrt{-2t-t^2}}

\implies w_t=\dfrac1{\sqrt{-2t-t^2}}

2. The problem is asking for \frac{\partial z}{\partial x} and \frac{\partial z}{\partial y}. But z is already a function of x,y, so the chain rule isn't needed here. I suspect it's supposed to say "find \frac{\partial z}{\partial s} and \frac{\partial z}{\partial t}" instead.

If that's the case, then

z_s=z_xx_s+z_yy_s

z_t=z_xx_t+z_yy_t

as the hint suggests. We have

z=\sin x\cos y\implies\begin{cases}z_x=\cos x\cos y=\cos(s+t)\cos(s^2t)\\z_y=-\sin x\sin y=-\sin(s+t)\sin(s^2t)\end{cases}

x=s+t\implies x_s=x_t=1

y=s^2t\implies\begin{cases}y_s=2st\\y_t=s^2\end{cases}

Putting everything together, we get

z_s=\cos(s+t)\cos(s^2t)-2st\sin(s+t)\sin(s^2t)

z_t=\cos(s+t)\cos(s^2t)-s^2\sin(s+t)\sin(s^2t)

8 0
3 years ago
The equation d=3t represents the relationship between the distance (d) in inches that a snail is from a certain rock and the tim
cestrela7 [59]

Answer:

Speed

Step-by-step explanation:

To find the distance the formula is d=st. Where d is the distance, s is speed, and t is time. So in the equation, 3 must be the speed of the snail.

6 0
3 years ago
Read 2 more answers
If the sin 30 = 1/2, then which statement is true?
egoroff_w [7]

Answer:

cos 60° = 1/2 because the angles are complements.

Step-by-step explanation:

3 0
3 years ago
7 yd<br> 4 yd<br> 18 yd<br> 11 yd<br> 14 yd
Dima020 [189]

Answer:

????????????

Step-by-step explanation:

8 0
3 years ago
A horse is free to roam and feed in an enclosed pasture that is 150 feet by 200 feet. At any given time, what is the probability
barxatty [35]

25/250 = 1/10

I do not know that much english. I an spanish so I might have done it wrong.

8 0
3 years ago
Other questions:
  • Michael has a collection of 1404 race cards.He hopes to sell the collection in packs of 36 cards,and make 633.75 when all the pa
    11·1 answer
  • Use subtraction 8×25×23
    10·2 answers
  • Factor the sum of terms as a product of the gcf and sum 18+20
    10·1 answer
  • Myra was putting her photos in an album with 3 photos on each page. If she had 11 hiking photos and 10 camping photos how many p
    5·2 answers
  • Which is a qualitative graph? On a coordinate plane, a line with positive slope goes through points (negative 1, 0) and (0, 3).
    10·2 answers
  • URGENT<br> What is the distance between the two points (-5, 6) and (8,-4)?
    7·2 answers
  • PLEASE SOME ONE ANSWER MY QUESTION (MOST RECENT)
    13·2 answers
  • Math homework !! <br> pls help , it’s due in 10 min :(( <br> question 1: a , b , c, d
    14·2 answers
  • Help with my homework ​
    12·1 answer
  • 6x²-23x+15<br> x²-9<br> Simplify the following expression by factoring
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!