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3 years ago

Last time. (fifty each) F ree p oints! Jess is signing out, but want to make everyone's day. Have a great day!

Mathematics

2 answers:

Svetllana [295]3 years ago

6 0

Answer:

Umm.. thanks so much

Step-by-step explanation:

gulaghasi [49]3 years ago

6 0

Answer:

well then

Step-by-step explanation:

i shall take these points with gratitude.

i thank you with the power of god and anime

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A group of hikers walks 3 miles east and then 1 mile north. After taking a break, they then hike 4 miles east to their final des

geniusboy [140]

Answer:

The vector that describes their hike from their starting position to their final destination is $\vec r = 7\,\hat{i}+1\,\hat{j}\,\,\,[mi]$ .

Step-by-step explanation:

In this problem we assume that orthogonal axes coincide with the north and east. We proceed to translate each sentence from statement into vectorial equations:

(i) A group of hikers walks 3 miles east and then 1 mile north:

$\vec r_{A} = 3\,\hat{i}+1\,\hat{j}\,\,\,[mi]$

(ii) After taking a break, they then hike 4 miles east to their final destination:

$\vec r_{B} = 4\,\hat{i}\,\,\,[mi]$

The vector that describes their hike from their starting position to their final destination is the sum of the vectors deducted above. That is:

$\vec r = \vec r_{A}+\vec r_{B}$ (1)

$\vec r = (3\,\hat{i}+1\,\hat{j})+4\,\hat{i}\,\,\,[mi]$

$\vec r = 7\,\hat{i}+1\,\hat{j}\,\,\,[mi]$

The vector that describes their hike from their starting position to their final destination is $\vec r = 7\,\hat{i}+1\,\hat{j}\,\,\,[mi]$ .

6 0

3 years ago

Find the area of the shaded polygon

Mars2501 [29]

Answer:

372

Step-by-step explanation:

area of trapezium = a+b/2 * h

a is the length on top

b is the length on the bottom

h is the height

7+24/2*24=

=372

6 0

2 years ago

Cheng likes a modern lawn sculpture made of four identical solid right pyramids with square bases. He decides to create an exact

Montano1993 [528]

This is the concept of volumes of solid figures;
To calculate for the volume of material required we calculate for the volume of the pyramid;
volume of the pyramid is given by:
volume=(length*width*height)/3
but in our case the base of the pyramid is square, therefore:
length=width=2 ft
height=6 ft
hence;
volume=(2*2*6)/3
volume=8 ft^3

The answer is 8 ft^3

8 0

3 years ago

Read 2 more answers

Adam earned 2 points in the first round of competition. In the second round, he earned 7 points. In the final round, he earned 9

Softa [21]

He earned 18 points in all

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3 years ago

Solve for x .................

skelet666 [1.2K]

123 times 43 plus 9.6 divided by 2

7 0

3 years ago