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4 years ago

Evaluate the expression described below if the number is 4. The difference between a number squared and the number.

1 answer:

3 0

Hello,

$x^2-x=4\\
x^2-x-4=0\\
\Delta=1^2-4*(-4)=17\\
x= \dfrac{1+ \sqrt{17} }{2} \\
or\\
x= \dfrac{1- \sqrt{17} }{2} \\
$

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The difference of two numbers is 6 and their product is 55 what are the two numbers

Evgesh-ka [11]

Let one number be x.
The other number is x-6

Product of the number is 55
x(x-6) = 55
x² - 6x - 55 = 0
 (x + 5)(x - 11) = 0
x = -5 or x = 11

x = -5
x - 6 = -11

x = 11
x - 6 = 5

Answer: The two numbers are either -5 and -11 or 5 and 11.

4 0

4 years ago

Jarred sells DVDs. His inventory shows that he has a total of 3,500 DVDs. He has 2,342 more contemporary titles than classic tit

cestrela7 [59]

X + y = 3,500 . . . (1)
x – y = 2,342 . . . (2)
(1) - (2) => 2y = 1158
y = 1158/2 = 579
x = 3500 - 579 = 2921

Therefore, he had 2,921 contempolary titles and 579 classic titles.

7 0

3 years ago

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Which are operations in the algebra of sets?

sergey [27]

Answer:

I found the Dictionary and mathematical definitions.

Step-by-step explanation:

The algebra of sets defines the properties and laws of sets, the set-theoretic operations of union, intersection, and complementation and the relations of set equality and set inclusion.

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4 years ago

The area of a newspaper page (opened up) is about 640.98 square inches. Determine the length and width of the page if its length

a_sh-v [17]

.✎let's answer it :3

question ⇩

✎ The area of a newspaper page (opened up) is about 640.98 square inches. Determine the length and width of the page if its length is about 1.25 times its width.

The area of a newspaper page (opened up) is about 640.98 square inches. Determine the length and width of the page if its length is about 1.25 times its width.The width of the page is ___ inches.

<h3>answer ➡ 1.24 inches </h3>

hope it helps 

correct me if I am wrong 

<h3> by </h3><h2>#galadohannadivine29</h2>

6 0

2 years ago

HELP TRIGONOMETRY!!!!!

musickatia [10]

Answer:

12.8 cm

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you of the relationships between angles and sides of a right triangle. Here, you have the side opposite the given 70° angle, and you want to find the hypotenuse. The appropriate relation is ...

Sin = Opposite/Hypotenuse

Solving for the hypotenuse, we get ...

Hypotenuse = Opposite/Sin

x = (12 cm)/sin(70°) ≈ 12.77 cm

x ≈ 12.8 cm

4 0

4 years ago

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