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katrin [286]
3 years ago
15

Can someone help me solve for x+y=3 and x-y=1?

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0

\underline{+\left\{\begin{array}{ccc}x+y=3\\x-y=1\end{array}\right}\ \ \ \ |\text{add both sides of the equations}\\\\.\ \ \ \ 2x=4\ \ \ \ |:2\\.\ \ \ \ x=2\\\\\text{put the value of x to the first equation}\\\\2+y=3\ \ \ \ |-2\\\\y=1\\\\Answer:\ x=2,\ y=1\to(2,\ 1)

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Law Incorporation [45]

Answer:

Gasoline = 10.2 * 3.80= 38.76

Water= 3 * 3.98 = 11.94

Ice- 3 * 1.99 = 5.97

Oranges= 1 * 8.89 = 8.89

Step-by-step explanation:

3 0
3 years ago
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What is another name for line P?
MatroZZZ [7]

Answer:

Line CD

Step-by-step explanation:

8 0
3 years ago
I need some help please​
Mama L [17]

Answer:

109

Step-by-step explanation:

Formula

<ZHG + <IHZ = <IHG

Givens

<ZHF = 11x - 1

<IHZ = 24

<IHG = 12x + 13

Solution

11x - 1 + 24 = 12x + 13             Combine terms on the left

11x + 23 = 12x + 13                  Subtract 13 from both sides

<u>      - 13             - 13  </u>

11x + 10 = 12x                           Subtract 11x from both sides

<u>-11x           -11x</u>

        10 =   x

Answer

11x - 1 = 11*10 - 1 = 110 - 1 = 109

7 0
2 years ago
Plot the following points and find the area of the figure. (3,2); (-3,2); (-3,-3); (3,-3)
nevsk [136]

We have been given 4 points (3,2), (-3,2), (-3,-3), (3,-3). We are asked yo plot these points on coordinate plane and find the area of the figure.

Upon plotting our given points, we will get a rectangle as shown in the attached file.  

We can see that the width is 5 units that is difference between y-coordinates of point (3,2)\text{ and }(3,-3).

\text{Width}=2-(-3)=2+3=5

We can see that the length of rectangle is 6 units that is difference between x-coordinates of point (-3,2)\text{ and }(3,2).

\text{Length}=3-(-3)=3+3=6

We know that area of rectangle is length times width.

A=\text{Length}\times \text{Width}

A=6\times 5

A=30

Therefore, the area of the figure would be 30 square units.

6 0
3 years ago
Can someone help me on the following?. 14.5n – 4 = 8 15. 2x + 5 – 4x = -3 16. 96=-6(-4 -3y)
leonid [27]
14. 5n - 4 = 8
           5n = 12
             n = 2.4

15. 3x + 5 - 4x = -3
              -x + 5 = -3
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16. 96 = -6(-4 - 3y)
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17. 3(x - 5) = -14 + 17x
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   -11x - 15 = -14
          -11x = 1
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18. 7z + 10 - z = 8z - 2(z - 5)
           6z + 10 = 8z - 2z + 10
           6z + 10 = 6z + 10
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                     z = z   (all real numbers are solutions)

Hope this helps.
5 0
3 years ago
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