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3 years ago

Write the inequality to represent the graph.

Mathematics

1 answer:

Liono4ka [1.6K]3 years ago

7 0

Answer:

x > -1

Step-by-step explanation:

Open circle so the sign is not inclusive. The point is at -1 and goes to the right so it is more than.

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Answer:

8/9. 5/9+1/3 L.C.M =9 ANS= 8/9.

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For what values of $j$ does the equation $(2x+7)(x-5) = -43 + jx$ have exactly one real solution? express your answer as a list

LiRa [457]

The values of 'j' are -11,5.

What is a Quadratic Equation?

Quadratic equations are the polynomial equations of degree 2 in one variable of the type $f(x) = ax^{2} + bx + c = 0$ where a, b, c, ∈ R and a ≠ 0.
The standard form of a quadratic equation is $ax^{2} + bx + c = 0$ .

Here, the given equation is (2x+7)(x-5) = - 43 + jx

On simplifying the equation we get,

$2x^{2} -10x+7x-35=-43+jx\\2x^{2} -3x-35+43-jx=0\\2x^{2} -3x-jx+8=0\\2x^{2} -(3+j)x+8=0.....(1)\\$

By comparing the given equation with the standard form of the quadratic equation we get,

a = 2

b = - (3 + j)

c = 8

Therefore,

$(-(3+j))^{2} -4\times2\times8=0\\(3+j)^{2} -64=0\\(3+j)^{2} =64\\$

Take the square root of both sides,

$\sqrt{(3+j)^{2} }=\sqrt{64} \\$

3 + j = ±8

Therefore,

3 + j = 8

j = 8 - 3

j = 5

3 + j = -8

j = -8 - 3

j = -11

Hence, the possible values of 'j' are -11,5.

Learn more about the quadratic equation at brainly.com/question/8649555

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2 years ago