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irinina [24]
3 years ago
15

Hello, I need help solving the system of equations by substitution method.

Mathematics
2 answers:
Llana [10]3 years ago
8 0
4x + 2y = 108
x = -5y

4(-5y) + 2y = 108
-20y + 2y = 108
<u>-18x</u> = <u>108</u>
 -18     -18
     x = 6
4(6) + 2y = 108
  24 + 2y = 108
<u>- 24           - 24</u>
           <u>2y</u> = <u>84</u>
            2      2
             y = 41
        (x, y) = (6, 41)
mash [69]3 years ago
5 0
4(-5y) + 2y = 180

-20y + 2y = 180

-18y = 180

y = -10
x = 50
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Can someone pls help me...
joja [24]
It is not a function and that is becuase a vertical line would pass through it twice
5 0
2 years ago
270 american dollar and recevied 3000 pesos when he returned from mexico he had 100 pesos left. how many will he recevie when he
AURORKA [14]
To solve this problem we can use simple proportion
If 
270$ -------------------------3000 pesos
x $  ---------------------------100 pesos               (x$ means that we dont know how much)
Now we crossmultiplying to get proportion
x*3000=270*100
Now we just to solve eq
3000x=27000  /:3000
x=27000:3000
x=9$ - its the result
7 0
3 years ago
Find the value of X in the triangle shown below
dedylja [7]

Answer:

102°

Step-by-step explanation:

This is an isosceles triangle

x = 180 - 39 - 39

x = 102°

5 0
3 years ago
0.5 divided by 2 standard algorithm
rjkz [21]

Answer:

Hello!!! erz here ^^

Step-by-step explanation:

0.5 divided by 2 in standard algorithm is...

4

8 0
3 years ago
The arena has come to an agreement with the Sleaford Rockers to pay them according to this formula: b = tp- ( s + 2,000)
Anna35 [415]

if I am not mistaken your answer is 92,000. I hope this helps you good luck with l=your mathematics.

7 0
3 years ago
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