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Marat540 [252]
3 years ago
10

Please Help Me! Math Question!

Mathematics
2 answers:
Mekhanik [1.2K]3 years ago
7 0
To solve this pair of equations, by using the substitution method, all you have to do is simply choose 1 equation and simply solve for any variable X and or y. Then solve for the other equation, by plugging in the equation.

Y = X + 4
Y = -2x - 2

X + 4 = -2x - 2
0 = -3x - 6
-3x = 6
X = -6/3
X = -2.

Y = X + 4
Y = -2 + 4
Y = 2.

P(-2,2). The following point would be the solution to the equation.
adoni [48]3 years ago
3 0
This will be simple since They are both solved for Y. :) put them across from each other (in parenthesis if you want to show which one was substituted). So we have ( x + 4 )= -2x - 2. Next subtract the 4 from both sides and add 2x to each side. Now we have 3x = -6. Divide by 3 and get X=-2. Plug X into an original equation and solve for Y. y = (-2) + 4. Y=2                           (2, 2)
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The difference between two integers is 8 and their product is 65. Assume that the larger of the two numbers is x. Write a quadra
zzz [600]

A quadratic equation in standard form that can be used to determine the value of x is x^{2} - 8x - 65 = 0.

The Factor of the equation from Part B is (x - 13)(x + 5)  and the possible solutions to the equation is x = 13 or -5.

The value for the second number is 5

<h3>Word Problem Leading To Quadratic Equation.</h3>

The general formula for quadratic equation in a in standard form is

ax^{2} + bx + c = 0

Given that the  difference between two integers is 8

Let the two integers = x and y,

and their product is 65. If the larger of the two numbers is x. Then,

x - y = 8 and xy = 65

Since we are looking for the value of x, make y the subject of formula in the first equation.

y = x - 8

Substitute y in the second equation.

x(x - 8) = 65

x^{2} - 8x - 65 = 0

x^{2} - 13x + 5x - 65 = 0

(x - 13)(x + 5) = 0

x = 13 or -5

We will ignore -5 since x is the larger number.

To get y Substitute x in the second equation.

xy = 65

13y = 65

y = 65/13

y = 5

Therefore, a quadratic equation in standard form that can be used to determine the value of x is x^{2} - 8x - 65 = 0. The Factor of the equation from Part B is (x - 13)(x + 5)  and the possible solutions to the equation is x = 13 or -5. The value for the second number is 5

Learn more about Quadratic Equation here: brainly.com/question/25841119

#SPJ1

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2 years ago
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8 0
3 years ago
Alonzo needs 5/6 of a yard of fabric to cover a chair. He plans to cover 8 chairs. What is the least amount of fabric he will ne
stepan [7]
You have to do 5/6 of 8
first 8÷6=1.3 (or remainder 3)
1.3×5=6.5
So that means Alonzo will need 6.5m at least amount of fabric.
Hope this helped!   :)
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3 years ago
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1) given
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8 0
3 years ago
Which of the following is the solution for 6x + 3 ≤ 27
postnew [5]

Answer:

x  ≤  4

Step-by-step explanation:

6x + 3 ≤ 27        subtract 3 both sides

6x ≤ 24              divide 6 both sides

x ≤ 4                   There's your answer

5 0
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