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nadya68 [22]
4 years ago
11

How do you solve (y=x-4)=(2x+y=5) using substitution?

Mathematics
2 answers:
liberstina [14]4 years ago
7 0
Y = x-4

2x + y = 5
2x + (x-4) = 5
3x - 4 = 5
3x = 9
x = 3
olya-2409 [2.1K]4 years ago
3 0
Substitution is done by replacing a variable for an equation. In this case:

2x+y=5
would be
2x+(x-4)=5 (If you notice, you see that the value of x was replaced in the main equation)

Then you would solve as normal.

2x+x-4=5
3x-4=5
3x=9
x=3

Then we can plug in x for any one of the equations to find y.
y=x-4
y=3-4
y=-1

So the solution is x=3 and y=-1.

:)
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Bethany s making trail mix with 3 cups of raisins for every 2 cups of peanuts
DaniilM [7]

Answer:

4 cups of raisins

3 cups of dates

6 cups of peanuts

and 2 cups of cashews

ratio cashews to raisins= 2:4

                                      = 1:2

ratio dates to peanuts= 3:6

                                   = 1:2

5 0
4 years ago
Lauren pays $19.99 for a membership fee to an online music store. Lauren buys songs from a new album at the price of $0.99 each.
sdas [7]

The right answer is Option B.

Step-by-step explanation:

Let,

Number of songs = x

Price of 1 song = $0.99

Membership fee = $19.99

Total amount paid = $21.97

According to given statement;

0.99x+19.99=21.97

Subtracting 19.99 from both sides

0.99x+19.99-19.99=21.97-19.99\\0.99x=1.98

Dividing both sides by 0.99

\frac{0.99x}{0.99}=\frac{1.98}{0.99}\\x=2

Lauren bought 2 songs.

The right answer is Option B.

Keywords: Linear equation, subtraction

Learn more about linear equations at:

  • brainly.com/question/10364988
  • brainly.com/question/10435816

#LearnwithBrainly

6 0
4 years ago
Which set contains only whole numbers divisible by 6?
lidiya [134]
SetY={6,24,36,78,84}
8 0
3 years ago
Read 2 more answers
The sum of the coordinates of the vertex of the parabola at y = x2 + 3 is _____.
Novosadov [1.4K]

Answer: The sum is 3.

Step-by-step explanation:

If we have a parabola, y = a*x^2 + b*x + c

We want to find the point (x, y) that corresponds to the vertex of that parabola.

The vertex of the parabola is at x value:

x = -b/2a

in this case

a = 1, b = 0, c = 3

then our vertex is at:

x = -0/2*1 = 0

Now we evaluate y(x) in this value and get:

y(0) = a*0^2 + 3 = 3

Then the vertex is at the point (0, 3)

the sum of the coordinates of the vertex is:

S = 0 + 3 = 3

7 0
3 years ago
What is the quotient of Negative 27. 374 divided by 7. 5 â€""3. 65 â€""0. 365 0. 365 3. 65.
Galina-37 [17]

The quotient of 27.374 divided by 7.5 is; <em><u>3.65</u></em>

We want to find the quotient of 27.374/7.5.

Now, to make this easy, let us find a way to write the decimals as whole numbers.

Thus;

27.374 = 27374 × 1/1000

Similarly, 7.5 = 75 × 1/10

Thus;

27.374/7.5 = (27374 × 1/1000)/(75 × 1/10)

>> (27374/75) × (10/1000)

>> 365 × 0.01

>> 3.65

Read more about finding quotient of decimal division at; brainly.com/question/408413

6 0
3 years ago
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