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Zina [86]
2 years ago
11

Please help ill mark brainliest​

Mathematics
1 answer:
IgorLugansk [536]2 years ago
5 0

Answer:

i think its 18

Step-by-step explanation:

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Factoring by grouping<br>1) x² + x² – 3x – 3 = 0​
N76 [4]

The value of x is x\geq -0.686 and x\leq 2.186

Step-by-step explanation:

Factorisation is not possible in this case since the 2 pairs available will not be giving the same outcome as required in factorisation.

This is a quadratic equation

x² + x² – 3x – 3 = 0​

2x² - 3x - 3 = 0

<u>Quadratic formula:</u>

\frac{-b±\sqrt{b^{2} }-4ac }{2a}

a=2

b= -3

x= -3

\frac{-(-3)+\sqrt{-3^{2} }-4(2)(-3) }{2(2)}

= \frac{3+\sqrt{33} }{4}

= 2.186

or

\frac{-(-3)-\sqrt{-3^{2} }-4(2)(-3) }{2(2)}

= \frac{3-\sqrt{33} }{4}

= -0.686

Therefore, the value of x is,

x\geq -0.686 and x\leq 2.186

Keyword: Factoring, Quadratic

Learn more about quadratic/factoring at

  • brainly.com/question/10666510
  • brainly.com/question/4460262

#LearnwithBrainly

4 0
3 years ago
A cylinder has a helght of 16 cm and a radius of 5 cm. A cone has a helght of 12 cm and a radius of 4 cm. If the cone is placed
erma4kov [3.2K]

Answer:

1055.04 cm³

Step-by-step explanation:

Given that,

Height of a cylinder, h = 16 cm

Radius of the cylinder, r = 5 cm

The height of a cone, h' = 12 cm

The radius of a cone, r' = 4 cm

The volume of the cylinder will be :

V=\pi r^2 h\\\\=3.14\times 5^2\times 16\\\\=1256\ cm^3

The volume of a cone is given by :

V'=\dfrac{1}{3}\pi r^2 h\\\\=\dfrac{1}{3}\times 3.14\times (4)^2\times 12\\\\=200.96\ cm^3

Volume of the air surrounding the cone Inside the cylinder = 1256 - 200.96 = 1055.04 cm³

Hence, the required answer is equal to 1055.04 cm³.

3 0
2 years ago
I WILL GIVE YOU ALL MY POINTS PLEASE JUST ANSWER THIS BEFORE I BREAKDOWN AND CRY HAHA NO BUT SERIOUSLY PLEASE ANSWER PLEASEEE IM
Elena-2011 [213]

Answer:

probability is 9

Step-by-step explanation:

4 0
3 years ago
What is the answer to 9x-15
iren [92.7K]

Answer:

your answer would be -135

3 0
2 years ago
Read 2 more answers
How many ways can Hannah give three of her eight T-shirts to her younger sister?
prisoha [69]
If Hannah gives her younger sister 3 shirts, it does not matter what order she hands them to her. No matter the order, it will still be the same group of 3 shirt. Since order is not important this problem can be solved using a combination.

Specifically we are asked to find 8C3 (sometimes called "8 choose 3"). This is a fraction. In the numerator we start with 8 and count down 3 numbers. In the denominator we start with 3 and count all the way down to 1. Thus we obtain,

\frac{(8)(7)(6)}{(3)(2)(1)}=(8)(7)=56
7 0
3 years ago
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