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jarptica [38.1K]
2 years ago
7

Use the Echelon Method: Solve x + 3y = 1 2x - 5y = 13

Mathematics
1 answer:
coldgirl [10]2 years ago
4 0

Answer:

x= 4, y= -1

Step-by-step explanation:

-2(x +3y= 1)

-2x-6y=-2

<u>2x -5y= 13</u>

-11y= 11

y= -1

2x -5(-1)= 13

2x +5= 13

2x= 8

x= 4

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What is the meaning of the point (25, 20)?
Reil [10]

Answer:

(25, 20 ) represents that the dimension of the coral is 25 feet long and 20 feet wide.

Step-by-step explanation:

The general representation P(x,y) represents the Cartesian Representation of a point in a 2 Dimension.

Here, x represents the distance of the point   P from y axis to the x axis.

and y  represents the distance of the point   P from x axis to the y axis.

(x, y) together gives the  2 dimensional representation of the point P.

Now here, the given coordinates are (25, 20)

So, here x = 25 and y = 20

So, (25, 20 ) represents that the dimension of the coral  is 25 feet long and 20 feet wide.

Hence, option 3 is the most appropriate.

6 0
3 years ago
2 1/5 + 1 3/5 = ??? Plz help
jok3333 [9.3K]

Answer:

3 \frac{4}{5}

Step-by-step explanation:

1) Add the whole numbers first.

3  + \frac{1}{5}  +  \frac{3}{5}

2) Join the denominators.

3 +  \frac{1 + 3}{5}

3) Simplify.

3 \frac{4}{5}

hence, the answer is 3 4/5.

5 0
2 years ago
While baking, Pedro used
ehidna [41]

Answer:

11 cups of flour..... any other questions?

Step-by-step explanation:

6 0
3 years ago
6) the circular base of a hemisphere of radius 2 rests on the base of a square pyramid of height 6. the hemisphere is tangent to
Rasek [7]

The length of the square base is thus 2 x 3\sqrt{2}/2 = 3\sqrt{2} = A

<h3>What is hemisphere?</h3>

Consequently, a hemisphere is a 3D geometric object that is made up of half of a sphere, with one side being flat and the other being a bowl-like shape. It is created by precisely cutting a spherical along its diameter, leaving behind two identical hemispheres.

EXPLANATION; Let ABCDE be the pyramid with ABCD as the square base. Let O and M be the center of square ABCD and the midpoint of side AB respectively. Lastly, let the hemisphere be tangent to the triangular face ABE at P.

Notice that triangle EOM has a right angle at O. Since the hemisphere is tangent to the triangular face ABE at P, angle EPO is also 90 degree. Hence, triangle EOM is similar to triangle EPO.

OM/2 = 6/EP

OM = 6/EP x 2

OM = 6\sqrt{6^2 - 2^2} x 2 = 3\sqrt{2}/2}

The length of the square base is thus 2 x 3\sqrt{2}/2 = 3\sqrt{2} = A

To know more about Hemisphere, visit;

brainly.com/question/13625065?referrer=searchResults

#SPJ4

6 0
1 year ago
Which line shows the first error in the solution?
masha68 [24]

Answer:

Line 4

Step-by-step explanation:

6(x+2) = 24

6x+12=24

6x=12

x=2

8 0
3 years ago
Read 2 more answers
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