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Bas_tet [7]
3 years ago
6

Use elimination X+y =9 X-y=7

Mathematics
1 answer:
Art [367]3 years ago
3 0

Answer:

x = 8

y = 1

Step-by-step explanation:

  x + y = 9

- ( x - y = 7)

-------------------

      2y = 2

        y = 2/2

        y = 1

   x + y = 9

x + ( 1 ) = 9

         x = 9 - 1  

         x = 8

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Write an integer that represents 5 inches of snow melting. *
miss Akunina [59]

Answer:

-5

Step-by-step explanation:

There was five inches of snow, correct? Now, the five inches are melting. It's kinda like subtraction.

5 - 5

6 0
4 years ago
Mary plants roseas in 1/4 of her garden. She also plants some tulips in her garden. She has 1/12 of the garden left to plant mor
zysi [14]

Answer:the fraction of Mary's garden that has tulips is 2/3

Step-by-step explanation:

Let x represent the full area if Mary's garden.

Mary plants roses in 1/4 of her garden. This means that the portion of the garden on which she planted roses would be 1/4 × x = x/4

She also plants some tulips in her garden. She has 1/12 of the garden left to plant more flowers. This means that the portion if the garden that she has left to plant more flowers would be 1/12 × x = x/12

The portion of the garden on which she planted tulips would be

x - (x/4 + x/12) = x - (3x + x)/12 = x - 4x/12

x - x/3 = (3x - x)/3 = 2x/3

Therefore, the fraction of Mary's garden that has tulips would be

(2x/3) /x = 2/3

7 0
4 years ago
If m∠UNR = 180° find m∠RNS<br> A. 27°<br> B. 34°<br> C. 59°<br> D. 94°
LenaWriter [7]

Answer:

Option A) m∠RNS=27°

Step-by-step explanation:

We know that m∠UNR = 180°. This tells us that the Sum of the enclosed angles should equal 180°, by trigonometry. So the enclosed angles are:

m∠RNS = (3x+6)^{o}

m∠SNT= (13x+3)^{o}

m∠TNU= (10x-11)^{o}

Now let us add all the angles and solve for the value of x as follow:

m_{RSN}+m_{SNT}+m_{TNU}=m_{UNR}\\\\(3x+6)+(13x+3)+(10x-11)=180\\\\3x+13x+10x+6+3-11=180\\\\26x-2=180\\\\26x=180+2\\\\26x=182\\\\

x=\frac{182}{26} \\\\x=7

Now lets plug in the value into the expression for angle m∠RNS to find the angle as:

RNS = (3x+6)^{o}\\\\RNS=(3(7)+6)^{o}\\\\RNS=(21+6)^{o}\\\\RNS=27^{o}

Thus Option A. is the correct answer.

7 0
3 years ago
Two math classes took the same quiz. The scores of 10 randomly selected students from each class are listed below. • Sample of C
padilas [110]

Answer:

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6 0
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How to write 30+54 in distributive property in an easy way
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