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vagabundo [1.1K]
3 years ago
9

Evaluate -4x +9 for x=8

Mathematics
2 answers:
larisa [96]3 years ago
7 0

Answer:

-23

Step-by-step explanation:

- 4 ( 8 ) + 9

- 32 + 9

- 23

alexgriva [62]3 years ago
3 0

Answer:

- 23

Step-by-step explanation:

Step 1:

- 4x + 9         Equation

Step 2:

- 4 ( 8 ) + 9        Input x value

Step 3:

- 32 + 9       Multiply

Answer:

- 23       Add

Hope This Helps :)

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If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
alexandr1967 [171]

The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: 2(-4y-9)+5y=-6

Step-by-step explanation:

We will solve the initial steps for substitution method for finding the correct answer

Given equations are:

x+4y = -9\ \  \ \ Eqn1\\2x+5y=-6\ \ \ Eqn2

From equation one

x+4y = -9\\x+4y-4y = -9-4y\\x = -4y-9

Putting x = -4y-9 in equation 2

2(-4y-9)+5y=-6

Hence,

The new equation after the expression equivalent to x from the first equation is substituted into the second equation is: 2(-4y-9)+5y=-6

Keywords: Linear equations, variables

Learn more about linear equations at:

  • brainly.com/question/726990
  • brainly.com/question/725998

#LearnwithBrainly

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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