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KIM [24]
3 years ago
8

Devbra swims 80 laps each practice and Mike swims 75 laps each practice. They each practice 4 days a week. How many laps do they

swim altogether in a week
Mathematics
1 answer:
fenix001 [56]3 years ago
6 0

Answer:

620

Step-by-step explanation:

80*4=320

75*4=300

320+300=620

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3241004551 [841]

k-4/3= 3

Mutiply both sides by 3 .

(3)(k-4/3)= (3)(3)

Cross out 3 and 3 , divide by 3 and then becomes k-4= 9

Move -4 to the other side

Sign changes from -4 to +4

k-4+4= 9+4

k= 13

Answer: k= 13

6 0
3 years ago
What is a equation in point slope form for a line perpendicular to y=-4x-10 that contains (1,-5)
mixas84 [53]
Y = 1/4x -5

HOPE THIS HELPS

3 0
4 years ago
Find the directional derivative of the function at the given point in the direction of the vector v. f(x, y, z) = xyz , (3, 3, 9
Anna [14]

The derivative of f(x,y,z) in the direction of a vector \mathbf u is

\nabla_{\mathbf u}f=\nabla f\cdot\dfrac{\mathbf u}{\|\mathbf u\|}

With f(x,y,z)=xyz, we get

\nabla f=(yz,xz,xy)

and \mathbf u=(-1,-2,2),

\|\mathbf u\|=\sqrt{(-1)^2+(-2)^2+2^2}=3

Then

\nabla_{(-1,-2,2)}f(3,3,9)=(27,27,9)\cdot\dfrac{(-1,-2,2)}3=-21

8 0
3 years ago
12 10,9,68,12<br> What is the most appropriate measure of center?
valentina_108 [34]

Answer: The most appropriate measure of center is the median.

Step-by-step explanation:

  • The measure of center generally represented by 1) mean 2) median 3) mode.
  • Mean is the best measure to represent the center of the data but when data have outliers it gets affected badly.
  • In that case, we use the Median as the best measure of center.

The given data is 12 10,9,68,12 .

As it can be seen that, the data have extreme value 68 ( called outliers).

In this case, we will use the Median as the best measure of center.

So, the most appropriate measure of center is the median.

5 0
3 years ago
At which root does the graph of f(x) = (x - 5)3(x + 2)2 touch the x-axis?<br> BB<br> -2<br> 2
Svetlanka [38]

Answer:

-2

Step-by-step explanation:

if x=- 2  then f(x)=(-2-5)3(-2+2)=0

so x=-2 is correct

3 0
3 years ago
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