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4vir4ik [10]
3 years ago
14

What is the best first step for solving the given system using substitution while avoiding fractions? =9x+4x=10 -9x+3y=3

Mathematics
2 answers:
padilas [110]3 years ago
4 0

Answer:

Solve for y in the second equation

D is correct

Step-by-step explanation:

Given: 9x+4y=10 and -9x+3y=3 system of equation.

We are given system of equation in x and y form of straight line.

We need to solve for x and y without using fraction.

We will choose those equation  has common factor.

If we pick first equation coefficients are 9,4 and 10.

Here, no any common factor.

Now we pick second equation.

-9x+3y=3

Common factors of coefficients are 3

If we divide each term by 3 we will get coefficient of y be 1 and rest are not in fraction.

So, we will pick second equation and solve for y.

-9x + 3y = 3

Divide by 3 both sides to each term

-3x + y = 1

Add 3x both sides

y = 3x + 1

So, we get y = 3x + 1 . In this equation none is fraction term.

aivan3 [116]3 years ago
3 0

Answer:

  Solve for y in the second equation

Step-by-step explanation:

We assume your system is ...

  • -9x +4y = 10
  • -9x +3y = 3

Dividing <em>the </em><em>second equation</em> by 3 gives ...

  -3x +y = 1

so an expression for y without fractions can be found by <em>solving for y</em>, that is, by adding 3x:

  y = 3x +1

_____

<em>Comment on alternate solution</em>

We'd be tempted to solve the first equation for -9x and substitute for that.

  -9x = 10 -4y

  (10 -4y) +3y = 3 . . . . . substitute for -9x

  -y = -7 . . . . . . . . . . . . . simplify, subtract 10

  y = 7 . . . . . . . . . . . . . . multiply by -1

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4 0
3 years ago
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There are 3 feet in a yard. How many yards, as a mixed number, will you drive until you reach this exit?
Ratling [72]

The number of yards, as a mixed number, will you drive until you reach this exit is 333 1/3 yards

<h3>How to determine the number of yards to drive?</h3>

The complete question is added as an attachment

From the attached figure, we have:

Exit = 1000 feet

From the question, we have

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So, the number of yards is

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Number of yard = 1000/3 yards

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6 0
2 years ago
Please help. I’ll mark you as brainliest if correct.
stiks02 [169]

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s344n2d4d5 [400]
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6 0
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Whats the correct answer ?
11Alexandr11 [23.1K]

Answer:

$80, $48

Step-by-step explanation:

The original price was x.

The price is reduced by 40%. The markdown is 40% of x, or 0.4x.

The actual dollar amount of the markdown is $32.

That means that 0.4x must equal $32.

We set up an equation and solve for x, the original price.

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x = 32/0.4

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The original price is $80.

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$80 - $32 = $48

The marked down price is $48.

Answer: $80, $48

3 0
3 years ago
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