1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Burka [1]
3 years ago
12

PLEASE DONT SKIP show all work

Mathematics
2 answers:
ra1l [238]3 years ago
6 0

Answer:

x=1±i√5

Step-by-step explanation:

the quadratic equation is in the form :

y=ax²+bx+c

y= 2x²-4x+12

x=(-b±√b²-4ac)/2a

x=-(-4)±√-4²-4(2)(12)/2a

x=4±√16-96/4

x=4±√-80/4

since the number under the square root then √-80=4i√5 ( assuming possitive numbers)

x=(4±4i√5)/4

x=4(1±i√5)/4

x=1±i√5

neonofarm [45]3 years ago
4 0

Answer:

i don't see nothing

Step-by-step explanation:

You might be interested in
Cynthia besch wants to buy a rug for a room that is 23ft wide and 26ft long. She wants t ok leave a uniform strip of floor aroun
Lostsunrise [7]

Answer:

Dimension of rug is (15\times 18)\ ft

Step-by-step explanation:

Given: Area of rug= 270 ft²

           Cynthia besch wants to buy a rug for a room that is 23ft wide and 26ft long.

Let´s assume the uniform strip size of floor around rug be "x".

As given, Cynthia wants to leave a uniform strip of floor around the rug.

∴ Rug dimension will be (23-2x)\times (26-2x)

We know, area of rectangle= width\times length

Forming an equation for area of rug.

⇒270= (23-2x)\times (26-2x)

Now solving the equation to find the dimension of rug.

270= (23-2x)\times (26-2x)

Using distributive property of multiplication.

⇒ 270= 598-46x-52x+4x^{2}

⇒ 598-98x+4x^{2}= 270

Subtracting both side by 270

⇒ 4x^{2}-98x+328= 0

using quadratic formula to solve the equation.

⇒  Formula: \frac{-b\pm \sqrt{b^{2}-4(ac) } }{2a}

∴ In the expression , we have a= 4, b= -98 and c= 328.

Now, subtituting the value in the formula.

= \frac{-(-98)\pm \sqrt{-98^{2}-4(4\times 328) } }{2\times 4}

= \frac{98\pm \sqrt{9604-4(1312) } }{8}

Opening parenthesis.

= \frac{98\pm \sqrt{9604-5248 } }{8}

= \frac{98\pm \sqrt{4356}}{8}

We know 66²=4356  and √a²=a  or -a

= \frac{98\pm 66}{8}

= \frac{98+66}{8}\ or \ \frac{98-66}{8}

= 20.5 \ or\  4

∴ Value of x will be either 20.5 ft or 4 ft

Ignoring decimal value, therefore taking value of x is 4 ft

Subtituting the value of x to find the dimension of rug.

Width of rug= (23-2x)

⇒ Width of rug= 23- 2\times 4

⇒ Width of rug= 23-8= 15\ ft

Next, Length of rug= (26-2x)

⇒ Length of rug= (26-2\times 4)

⇒ Length of rug= 26-8= 18\ ft

Hence, dimension of rug is (15\times 18)\ ft

6 0
3 years ago
Antony spent 328 minutes reading on Monday, Jose spent 159 minutes reading on Monday, how many more minutes did Antony spend tha
trapecia [35]

Answer:

hjajahajahaj

Step-by-step explanation:

4 0
3 years ago
During the sale Mr.Hansen purchased a coat for 60% off the regular price. The coat normally sold for $220. How much money did he
Inessa [10]

Answer:

$132

Step-by-step explanation:

220/100 is 2.2

2.2 times 60 is 132

He saved 132 dollars

3 0
3 years ago
In a writing competition, the first place winner receives 1/2 of the prize money. The second runner up receives 1/4 of what the
worty [1.4K]

Answer:

10,000 is the total amount of.money that was distributed

6 0
3 years ago
The smelliness of cheese (denoted by S) can be defined as a function of the number of bacteria in the cheese (denoted by B) and
DedPeter [7]

Answer: OPTION C.

Step-by-step explanation:

Given the following formula:

S=B*A

You know that "S" is the smelliness of cheese, "B" is the number of bacteria in the cheese and "A" is the surface area in square centimeters of the cheese.

For example, suppose that there are 3,000\ bacterias in a surface area of 60 \ cm^2.

Substitute into the formula these values:

 B=3,000\ bacterias\\\\A=60\ cm^2

And then evaluate:

S=(3,000\ bacterias)(60\ cm^2)\\\\S=180,000\ bacterias*cm^2

Therefore, you can conclude that the appropriate measurement unit  for "S" is:

bacterias*cm^2

6 0
3 years ago
Other questions:
  • A compact disc player cost £50 plus 17 1/2% VAT
    11·2 answers
  • What is the solution to the inequality? −4x − 8 > −20
    6·2 answers
  • The height of the triangle is 7 cm longer than its base. the area of the triangle is 60 cm squared. what is the base of the tria
    10·2 answers
  • Solve for T. B=RT-4/6​
    9·1 answer
  • How do you divide 20,400 by 10
    12·2 answers
  • Given that a^­­b = x, evaluate the following: a^2b
    12·1 answer
  • write the six digit number that has the digit 4 in the thousands’ place, with each of the remaining digits being 3.
    15·1 answer
  • What is the GCF of:<br> 15x^2y and 20xy
    9·1 answer
  • NEED ANSWER AS FAST AS POSSIBLE DUE IN 30 MIN!!!
    9·2 answers
  • 11. 'Jet Tours' has an aeroplane that will carry 27 passengers. Each of the 27 passengers pays £55 to fly from Liverpool to Prag
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!