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Brut [27]
1 year ago
7

A system of equations is shown below. Solve for x. y = x² - 6x + 4 y = x + 1

Mathematics
1 answer:
rjkz [21]1 year ago
6 0

The value of x in the given quadratic equations is either -2.7 or -11.3.

<h3>What are quadratic equations?</h3>

A quadratic equation is a second-degree algebraic equation in x. ax² + bx + c = 0, where a and b are coefficients, x is the variable, and c is the constant term, is the quadratic equation in its simplest form.

Given first equation, y = x²- 6x + 4 second equation, y = x +1

Put the value of y in the first equation to get

x + 1 = x² - 6x + 4

Solving this equation

x² - 7x + 3 = 0

Using quadratic formula,

x = - b ± \frac{\sqrt{(b^{2}- 4ac)}}{2a}

x = - 7 ±  \frac{\sqrt{(-7)^{2}- 4(3)}}{2}

x = - 7 ± 4.3

Therefore in the given quadratic equations, the value of x can be either -2.7 or -11.3

For more information on quadratic equations, visit:

brainly.com/question/1863222

#SPJ13

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Y = –3x – 5 help I don’t know the answer please
earnstyle [38]

Answer:

x=-5/3

Step-by-step explanation:

Add 5 to both sides to get 5=-3x.

Then divide by -3.

And get -5/3=x

6 0
3 years ago
Three girls download a total of 36 songs on their iPods. Jane downloaded twice as many as Inez and since Tracy wanted to have th
lesya692 [45]
J + i + t = 36
j = 2i
t = j + 1.....t = 2i + 1

(2i + 1) + i + (2i) = 36
5i + 1 = 36
5i = 36 - 1
5i = 35
i = 35/5
i = 7 <=== Inez downloaded 7 songs

j = 2i = 2(7) = 14 <==Jane downloaded 14 songs
t = 2i + 1 = 2(7) + 1 = 15 <== Tracy downloaded 15 songs

7 0
3 years ago
2. Which expression is equivalent to 3ly-6)?
Alchen [17]

Answer:

pyfoydoye9ye9ye9ts8ts9teo5e

6 0
3 years ago
You have a solid Rectangle of dough. Consider the cross sections that are formed when you slice into the cube as described. Draw
Phantasy [73]
B is the answer I think trying it tho
5 0
2 years ago
Max has 5.50. He has eight more quarters than he does nickels. He had four times as many dimes as he has nickels. How many quart
Oliga [24]

Answer:

<h2>There are 13 quarters, 5 nickels and 20 dimes.</h2>

Step-by-step explanation:

Givens

  • Max has $5.50.
  • He has eight more quarters than he does nickels.
  • He had four times as many dimes as he has nickels.

From these statements, we can deduce algebraical expressions to solve the problem. Let's call q quarters, n nickels and d dimes.

q=n+8 (8 more quarters than nickels)

d=4n (he has four times as many dimes as he has nickels).

0.25q+0.05n+0.10d=5.50 (Max has a total of $5.50, one quartes is $0.25, one nickel is $0.05 and one dime is $0.10).

Let's replace the first two expressions into the third equation

0.25(n+8)+0.05n+0.10(4n)=5.50\\0.25n+2+0.05n+0.40n=5.50\\0.70n=5.50-2\\n=\frac{3.50}{0.70}\\ n=5

There are 5 nickels.

Now, we use this value to find the number of quarters

q=5+8=13

There are 13 quarters.

Also, d=4(5)=20

There are 20 dimes.

Therefore, there are 13 quarters, 5 nickels and 20 dimes.

3 0
3 years ago
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