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Jlenok [28]
3 years ago
7

Please Help Me

Mathematics
1 answer:
wel3 years ago
6 0
X = 3
y = -1 

get the x or y by itself first (second eq. is easier)
So, x + 2y = 1
          -2y     -2y
Now we get: 
x = -2y +1 Plug it into the other equation.

2x + 3y = 3
2(-2y +1) + 3y = 3
-4y + 2 + 3y = 3
-1y +2 = 3
+1y -3    -3  +1 y

y = -1 (plug into either eq to get x)

<span>x + 2y = 1
</span>x+2(-1) = 1
x-2=1
 +2  +2

x = 3

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HELP!!!!
Nonamiya [84]
Your answer is E. $25.

First let under 12 = u, over 12 = o, and adults = a.
We can now write the equations:

2u + 3a + 3o = 174
4u + 2a = 122
a + o = 46

Because we know that a + o = 46, and 3a + 3o is in the first equation, we can multiply 46 by 3 to get what 3a + 3o equals. This makes 138.
Now we can substitute 138 into the first equation to get 2u + 138 = 174
2u = 36
u = 18

Now that we know what u equals, we can substitute it in to the second equation to get:
4(18) + 2a = 122
72 + 2a = 122
2a = 50
a = $25

I hope this helps! Let me know if you have any questions :)
8 0
3 years ago
hi do I have this answer right? I just need someone help me out with this question so I can get the right answer
Kobotan [32]
I belive his answer is wrong B/c the graph does not even start near 310 the first to bars make it to 50 and 150 so even if u add the two together it would only be 200 so, the answer would be B
6 0
3 years ago
Anthony received $150 for his birthday this year. This was $10 less than half the amount
vladimir2022 [97]

Answer:

320

Step-by-step explanation:

if he received 10 less than half then you would just have to add that 10 back and multiply by 2.

150+10=160*2=320

8 0
3 years ago
Read 2 more answers
Find the volume of the cylinder
valkas [14]
  • Radius=16mm=r
  • Height=h=17.5mm

Volume:-

  • πr^2h
  • π(16)^2(17.5)
  • π(256)(17.5)
  • 4480πmm^2
7 0
2 years ago
For an angle _ with the point (5, _12) on its terminating side, what is the value of cosine?
Vlad [161]
Cos θ = adj/hyp = 5/sqrt(5^2 + (-12)^2) = 5/sqrt(25 + 144) = 5/sqrt(169) = 5/13
5 0
3 years ago
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