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diamong [38]
3 years ago
13

Solve the system by substitution. у = x -2x + 4y = 16

Mathematics
2 answers:
Novosadov [1.4K]3 years ago
7 0

Answer:

Step-by-step explanation:

y = x

-2x + 4y = 16

-2x + 4x = 16

2x = 16

x = 8

y = 8

(8,8)

Umnica [9.8K]3 years ago
5 0

Answer:

Since y=x, then both variables must be the same.

-2x + 4y= 16

You have to have 16 on both sides

-2(8) + 4(8)=16

-16 + 32= 16

         16=16

Step-by-step explanation:

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Solve the equation below and find the variation constant, k .Find y when x = 7 and z=5, if y varies jointly as x and 2, and y= 1
Vlada [557]
<h3>Answers:</h3>

Variation Constant: k = 7/6

y = 245/6 when x = 7 and z = 5

====================================

Explanation:

"y varies jointly as x and z" means that y = kxz

We have (x,y,z) = (4,14,3) as one triple, so,

y = kxz

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The equation goes from y = kxz to y = (7/6)xz

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Plug in x = 7 and z = 5 to find y

y = (7/6)xz

y = (7/6)*7*5

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3 years ago
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laila [671]

Answer:

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Step-by-step explanation:

Giving the following information:

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4 0
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Answer:

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