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2 years ago

Pleaseeeeeeeeeeeeeeeeee HELPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

Mathematics

2 answers:

Kaylis [27]2 years ago

8 0

A square i believe.

Hope this helps !

lora16 [44]2 years ago

6 0

This would be a square

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5. Find the discriminant of 15x2 = 4x – 1 and describe

diamong [38]

Answer:

a) The discriminant of the equation = - 44

b)The nature of the roots will be imaginary.

c) $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

Step-by-step explanation:

Here, the given expression is $15x^{2} = 4x -1$

or, $15x^{2} - 4x + 1 = 0$

Now the discriminant (D) of a quadratic equation $ax^{2} +b x + c = 0$

D = $b^{2} - 4ac = (-4)^{2} - 4(15) (1) = 16 - (60) = -44$

Hence, the discriminant of the equation = - 44

As D< 0, so the roots will be imaginary.

Now,by quadratic formula : $x = \frac{-b \pm \sqrt{b^{2} - 4ac} }{2a}$

So, here $x = \frac{-(-4) \pm \sqrt{D} }{2a} = \frac{4 \pm \sqrt{(-44 )} }{30}$

So, either $x = \frac{4 + \sqrt{(-44 )} }{30} or, x = \frac{4 - \sqrt{(-44 )} }{30}$

or, $x = \frac{2 +\sqrt{11} i}{15} or, x = \frac{2 - \sqrt{11} i}{15}$

8 0

3 years ago

Express 30 as a product of its prime factors

Olegator [25]

Answer:

5 * 3 * 2

Step-by-step explanation:

15 * 2

5 * 3 * 2

3 0

2 years ago

Read 2 more answers

I need to solve using elimination

yan [13]

Answer:

x = 3, y = 2

Step-by-step explanation: Can i have brainliest

6 0

3 years ago

The rent was increase by 7,5 what will be the new rent price

Shkiper50 [21]

Answer:

Is this the full question?

Step-by-step explanation:

5 0

3 years ago

If 10% is deducted from a bill, $58.50 remains to be paid. How much is the original bill?

NARA [144]

Answer:

From the above we can roughly for an equation which is:

58.50 = Bill - (10% x Bill)

58.5 = Bill - (1/10 x Bill)

58.5 = 9/10 x Bill (Divide both sides by 9/10)

We get:

Bill = 58.5 / (9/10)

Bill = 65

Original bill is $65.

8 0

2 years ago