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Tema [17]
3 years ago
9

What is the x value in the soulution to this system of linear equation 2x-y=11 x+3y=-5

Mathematics
1 answer:
ollegr [7]3 years ago
7 0

Answer:x=7

Step-by-step explanation:

2x-y=11  equation1

x+3y=-5  equation2

multiplying equation 2 by 2 in order to cancel x

2(x+3y=-5)

2x+6y=-10   equation 3

subtacting equation 1 and 3

2x-2x-y-6y=11-(-10)

-7y=21

y=-3

put the value of y in equation 1 to find the value of x

2x-(-3)=11

2x=11+3

2x=14

x=7

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How to solve this pythagoras theorem
My name is Ann [436]

Answer:

see explanation

Step-by-step explanation:

The hypotenuse is the longest side thus is (4x + 1)

The legs are 2x and (4x - 1)

Using Pythagoras' theorem, then

(4x + 1)² = (2x)² + (4x - 1)² ← expanding factors

16x² + 8x + 1 = 4x²  + 16x² - 8x + 1 , that is

16x² + 8x + 1 = 20x² - 8x + 1 ( subtract 20x² - 8x + 1 from both sides )

- 4x² + 16x = 0 ( multiply through by - 1 )

4x² - 16x = 0 ← factor out 4x from each term

4x(x - 4) = 0

Equate each factor to zero and solve for x

4x = 0 ⇒ x = 0

x - 4 = 0 ⇒ x = 4

Now x > 0, thus x = 4

2x = 2(4) = 8

4x - 1 = 4(4) - 1 = 16 - 1 = 15

4x + 1 = 4(4) + 1 = 16 + 1 = 17

Thus

perimeter = 8 + 15 + 17 = 40 cm

3 0
3 years ago
Find an equation in standard form for the ellipse that satisfies the given conditions. Major axis length 10 on y-axis minor axis
Helen [10]
The answe might be e= 10\16
3 0
3 years ago
I NEED IT EXTREMELY FAST!!!!
pochemuha

Answer:

x = 11 | Scale factor = 2

Step-by-step explanation:

As you can see, the 3 turns into a six meaning it multiplied by 2. Apply this to 5.5 to get 11. The 2 is your scale factor.

Hope this helps,

If you like my answer please give brainliest

Happy Holidays to everyone!

6 0
2 years ago
Read 2 more answers
In your computation, approximate its value as 3.14.
andrey2020 [161]

Answer: d

Step-by-step explanation:

Find the area of the rectangle.

A=l*w\\A=(15in)(12in)\\A=180in^2

Find the area of the base of the semicircle.

A=\pi r^2

12 in would be the diameter, divide by 2 to get the radius.

\frac{12}{2}=6

Plug this into the formula.

A=(3.14)(6)^2\\A=113.04in^2

Since we do not have a full circle but a semi one instead, we must divide our result by 2.

\frac{113.04}{2}=56.52in^2

Add both areas.

180+56.52=236.52in^2

7 0
3 years ago
I need help solving this ​
Alekssandra [29.7K]

Answer:

I'd say x is 15-16

it's only a bit larger than the 10

4 0
2 years ago
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