3 years ago

Twenty students ride on your bus

Mathematics

1 answer:

kotegsom [21]3 years ago

3 0

Answer: 8

Step-by-step explanation:

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<img src="https://tex.z-dn.net/?f=2x%5E%7B2%7D%20%2B12x-7%3D0%20%5C%5C" id="TexFormula1" title="2x^{2} +12x-7=0 \\" alt="2x^{2}

m_a_m_a [10]

Answer:

-2. 46

- 9.54

Step-by-step explanation:

2x²+12x-7=0
2x²+12x+18= 25
2*(x²+6x+9)=25
2*(x+6)²= 5²
x+6= 5√2/2 ⇒ x= 5√2/2 -6 ≈ -2. 46
x+6= -5√2/2 ⇒ x= -5√2/2 -6 ≈ - 9.54

4 0

3 years ago

Pls help i need to pass

Phoenix [80]

Answer:

d x=+-3

Step-by-step explanation:

divide both sides by 2

4 0

3 years ago

Read 2 more answers

Find the solutions of the quadratic equation -9c² +2 +3 = 0.

Tresset [83]

Given that,

An equation : -9c² +2c +3 = 0

To find,

Find the value of x.

Solution,

We have, -9c² +2c +3 = 0

We can solve it using the formula as follows :

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Here, a = -9, b = 2 and c =3

Put the values,

$c=\dfrac{-2\pm \sqrt{(2)^2-4(-9)(3)}}{2(-9)}\\\\c=\dfrac{-2+\sqrt{(2)^{2}-4(-9)(3)}}{2(-9)}, \dfrac{-2-\sqrt{(2)^{2}-4(-9)(3)}}{2(-9)}\\\\c=-0.47, 0.69$

So, the solution are -0.47 and 0.69.

8 0

3 years ago

Is the square root of 5 times the square root of 5 rational?

jeka57 [31]

No 20.0000004 cannot be rational.

5 0

3 years ago

What are the factors of the expression (y-2)(x+3)

mr Goodwill [35]

The factors of the expression is 2and -3

8 0

3 years ago

Read 2 more answers