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
nadya68 [22]
3 years ago
7

What’s the answer please help

Mathematics
1 answer:
noname [10]3 years ago
3 0

Answer:

\boxed{\text{A. }\math{\left \{ x \, | \, x \in \mathbb{R}, x < -2 \right \}}}}

Step-by-step explanation:

The open circle means that the point is not included in the solution set, and the arrow pointing left means that all numbers less than -2 are members.

In set-builder notation, each term has a special meaning. The braces enclose the members of the set.

Here's how you translate the notation,

\begin{array}{rcl}\\\left \{ & = & \text{The set of}\\x & = & \text{all x values}\\| & = &\text{such that}\\x & = & x\\\in & = &\text{is a member of}\\\mathbb{R}, & = &\text{all real numbers, and}\\x < -2 & = & \text{x is less than -2}\\\end{array}\\\text{The answer is }\boxed{\textbf{A. }\mathbf{\left \{ x \, | \, x \in \mathbb{R}, x < -2 \right \} }}}

You might be interested in
A triangle has the dimensions shown. The perimeter of
exis [7]

Answer:

A. linear expression

Step-by-step explanation:

Just got it right on the test.

4 0
3 years ago
Read 2 more answers
The diagonal of a TV set is 13 inches long. It’s length is 7 inches more than the height. Find the dimensions of the TV set.
alukav5142 [94]

Answer: The length is 12 inches while the height is 5 inches

Step-by-step explanation: It the Television has a diagonal of 13 inches, and a height of H inches, then the length would be (H + 7) inches. It’s length is 7 inches more than the height. At this point we can draw up a right angled triangle with the hypotenuse as 13 (diagonal side) and the other two sides as H and (H + 7)

Then we can apply the Pythagoras theorem which states that

AC^2 = AB^2 + BC^2

(Where AC is the hypotenuse and AB and BC are the two other sides)

Hence,

13^2 = H^2 + (H + 7)^2

169 = H^2 + (H^2 + 14H + 49)

169 = 2H^2 + 14H + 49

By collecting like terms we now have

169 - 49 = 2H^2 + 14H

120 = 2H^2 + 14H

By re-arranging all terms on one side of the equation, we arrive at

2H^2 + 14H - 120 = 0

Divide all sides by 2

H^2 + 7H - 60 = 0

To solve the quadratic equation, we now factorize and we have,

H^2 + 12H - 5H - 60 = 0

(H + 12) (H - 5) = 0

Therefore

Either H + 12 = 0 OR

H - 5 = 0

Hence, Either H = -12 or H = 5

The dimension can not be a negative value so we shall take h equals 5.

Having calculated the height of the television as 5 inches, the length which was given as H + 7 can now be calculated as

Length = H + 7

Length = 5 + 7

Length = 12

Therefore, the length of the Television is 12 inches and the height is 5 inches

4 0
3 years ago
The expression -2(x-4) is the same as?​
Tomtit [17]

Answer:

-2x + 8

Step-by-step explanation:

I applied the distribution technique to the original question.

5 0
2 years ago
If 3x is one factor of 3x^2-9x, what is the other factor?
Rudik [331]
The answer is:  " (x² − 3) " .
_________________________________
Explanation:
_________________________________

Given:  3x² <span>− 9x ;  factor out a "3x" ; 
_________________________________
 
   </span>→  3x (x² − 3) ;
_________________________________
     The answer is:  " (x² − 3) " .
_________________________________
7 0
3 years ago
Write the first 4 terms of the sequence defined by the rule. f(n) = n + 10
marshall27 [118]

Answer:

n(1) = 11, n(2) = 12, n(3) = 13, n(4) = 14

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • 99 POINTS- multi question-only answer if your positive-
    15·2 answers
  • Find an equation of the line that passes through the given point and has the indicated slope m.
    8·1 answer
  • Choose the best definition for the following phrase: combining like terms
    12·1 answer
  • The Hogwarts Express train has reduced its one-way fare from 360360 360 360 galleons to just 270270 270 270 galleons. What is th
    11·2 answers
  • PA. SALES TAX IS CHARGED AT THE RATE OF 6%. FIND THE TAX AND THE TOTAL PRICE YOU WOULD PAY FOR AN $860 STEREO.
    13·2 answers
  • The speed of light is about 6.71x10 squared (8) miles per hour. write that number in standared form?
    11·1 answer
  • 200 centimeters = how many meters
    8·1 answer
  • If f(x) is a third degree polynomial function, how many distinct imaginary roots are possible?​
    13·2 answers
  • ???????????????????plz
    8·1 answer
  • What is the value of the rational expression below when is equal to 5?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!