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N76 [4]
3 years ago
12

The pairs that equal to 4x-y=10

Mathematics
1 answer:
Tcecarenko [31]3 years ago
6 0
You can work it out by using trial and error

so you get

x=3 , y=2
You might be interested in
Please help me!!!! So confused
yarga [219]

<em>Question:</em>

The area of the kite is 48 cm². What are the lengths of the diagonals PR and QS?

________


<em>Solution:</em>

You can split the kite into two isosceles triangles:   PSR and PQR.

Assume that both diagonals intersect each other at the point O.


•   Area of the triangle PSR:

           m(PR) · m(OS)
A₁  =  ————————
                     2

           (x + x) · x
A₁  =  ——————
                  2


           2x · x
A₁  =  ————
              2


A₁ = x²        (i)


•   Area of the triangle PQR:

            m(PR) · m(PQ)
A₂  =  ————————
                     2

           (x + x) · 2x
A₂  =  ——————
                  2

           2x · 2x
A₂  =  ————
               2

           4x²
A₂  =  ———
             2


A₂ = 2x²        (ii)


So the total area of the kite is

A = A₁ + A₂ = 48


Then,

x² + 2x² = 48

3x² = 48

            48
x²  =  ———
            3

x² = 16

x = √16

x = 4 cm


•   Length of the diagonal PR:

m(PR) = x + x

m(PR) = 2x

m(PR) = 2 · 4

m(PR) = 8 cm


<span>•   </span>Length of the diagonal SQ:

m(SQ) = x + 2x

m(SQ) = 3x

m(SQ) = 3 · 4

m(SQ) = 12 cm


I hope this helps. =)


Tags:  <em>polygon area triangle plane geometry</em>

8 0
3 years ago
Simplify please.
DerKrebs [107]

the answer is D, because the “ a “ thats alone has an invisible one in front of it, so it’ll be 1a+2a+3a+4a

8 0
3 years ago
Read 2 more answers
Find m/FEG<br><br> A.20<br> B.40<br> C.60<br> D.120
noname [10]
The inside angles of the triangle add to equal 180 and so does m/FEG with unknown triangle angle.

x+2x = x+40
2x = 40
x = 20

mFEG
= 20 + 40
= 60

answer C

6 0
4 years ago
Read 2 more answers
How do you add parentheses to 9 + 12 / 3 + 4 / 2 + 1 * 2 to make the answer 12? Please help quick.
morpeh [17]

Answer:

so the final answer is =17

Step-by-step explanation:

9+12/3=13+4/2=2+1*2=2 the answer is 13+2+2=17

4 0
2 years ago
Point A(−5,8) is reflected across the line y = x. What are the coordinates of A′? Show your work and explain.
harina [27]

Answer:

c

Step-by-step explanation:

c

8 0
3 years ago
Read 2 more answers
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