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
Vlada [557]
3 years ago
11

What is the value of the expression 2x² – 5x + 6 when x = -2?

Mathematics
1 answer:
Svet_ta [14]3 years ago
3 0

Answer:

24 is correct answer

Step-by-step explanation:

2 {x}^{2}  - 5x + 6 \\  = 2 {( - 2)}^{2}  - 5 \times ( - 2) + 6 \\  = 2 \times 4 + 10 + 6 \\  = 8 + 10 + 6  \\  = 24

hope it helped you:)

You might be interested in
The sum of the interior angles of a quadrilateral ___ the sum of its exterior angles. Select one: a. > b. < c. equals
viktelen [127]

Answer:

The sum of the interior angles of a quadrilateral <u>equals</u><u> </u> the sum of its exterior angles.

Step-by-step explanation:

The sum of the exterior angles of a quadrilateral is 360 degrees.

The sum of the interior angles = (n-2)*180

Here n = 4, the number of sides.

Quadrilateral has 4 sides.

The sum of the interior angles = (4 - 2)*180

= 2*180

= 360 degrees.

Therefore, the sum of the interior angles of a quadrilateral <u>equals </u> the sum of its exterior angles.

Hope this will helpful.

Thank you.

6 0
2 years ago
2. If a, b are non-zero rational numbers, and c is a non-zero irrational number, what can we say about
topjm [15]
B lookkkdhdvdb svdbd dhd. She d. Did d. He r. He. Hebrbeue. I’m going uuuyyyyyyyywjd
5 0
3 years ago
Seven times the sum of 4 and some number is 42
Naddik [55]

Answer:

x=2

Step-by-step explanation:

7\times{(4+x)}=42

Divide both sides by 7:

4+x=42\div{7}\\4+x=6

Subtract 4 from both sides:

x=6-4\\x=2

7 0
3 years ago
Need help with this both please help me it due today at 11:59pm please will mark brainiest please
exis [7]

Answer:

c= -20

x= 38

Explanation:

Solve for x and c by simplifying both sides of the equation, then isolating the variable.  

hope this helps!

8 0
3 years ago
Solve each equation by completing the square <br>r² = –12r - 35​
Fittoniya [83]

Answer:

r = - 7, r = - 5

Step-by-step explanation:

Given

r² = - 12r - 35 ( add 12r to both sides )

r² + 12r = - 35

To complete the square

add ( half the coefficient of the r- term )² to both sides

r² + 2(6)r + 36 = - 35 + 36

(r + 6)² = 1 ← take the square root of both sides )

r + 6 = ± 1 ( subtract 6 from both sides )

r = - 6 ± 1, thus

r = - 6 - 1 = - 7 or r = - 6 + 1 = - 5

7 0
3 years ago
Other questions:
  • PLEASE HELP! Lina and Josh each made a factor tree to find the prime factorization of 126.
    5·2 answers
  • Please help Iv'e been waiting all day!
    6·1 answer
  • Still pretty confused on this.
    8·1 answer
  • Use two unit multipliers. to convert 400 inches to yards<br><br>show all the work​
    14·1 answer
  • If you roll a 6-sided die 48 times, what is the best prediction possible for the number of times you will roll a six?
    7·1 answer
  • What is the answer plz show work
    13·1 answer
  • The formula for volume of a rectangular prism is V= l, w, h,. Study the figure shown here. How many cubic units is it?
    10·2 answers
  • Given that the endpoints of a diameter are (7,-3) and (-1,7), determine the equation of the circle.
    7·2 answers
  • Find the solution to the system of equations <br> 3x+3y+3z=27 <br> x+3y+3z=17 <br> x-2y-5z=0
    14·1 answer
  • What is the value of x when y = 6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!