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drek231 [11]
3 years ago
13

Could somebody help me? Part A only. Thank you!

Mathematics
1 answer:
kifflom [539]3 years ago
3 0
(x-70) + (x-70) + 90 +90

2x-140+180

I'm not sure on the properties though...I hope I was able to help
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What is 13 nickels combined with 6 dimes?
Setler [38]
125 = 6 dimes = 60 and 13 nickles = 65

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Ivenika [448]
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2x — бу = 12<br> х+ 10 = — 9
Serggg [28]

Answer:

x = -19; y = 25/3

Step-by-step explanation:

Step 1: solve the equation with only one variable

Isolate the variable (x)

x + 10 = -9

x = -9 - 10

x = -19

Step 2: input new information into the other equation

If x = -19, then:

2(-19) - 6y = 12

Isolate the variable (y)

-38 - 6y = 12

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y = 50 ÷ 6

y = 50/6

Simplify

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5 0
3 years ago
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Afina-wow [57]
I wanna say B but i don’t remember i had that question before though
4 0
3 years ago
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Simultaneous equations<br> x^2+3xy=10<br> x=2y
satela [25.4K]

9514 1404 393

Answer:

  (x, y) = (-2, -1) or (2, 1)

Step-by-step explanation:

Substitute for x in the first equation:

  (2y)^2 +3(2y)y = 10

  10y^2 = 10

  y^2 = 1

  y = ±1

  x = 2y = ±2

Solutions are (x, y) = (-2, -1) or (2, 1).

8 0
3 years ago
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