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
lisov135 [29]
3 years ago
9

Melody is solving the equation x +12=31. Find her mistake and correct it

Mathematics
2 answers:
harkovskaia [24]3 years ago
8 0

Answer:

You need to subtract 31 from 12 to get what x is. Melody added instead of subtracting.

Step-by-step explanation:

kati45 [8]3 years ago
7 0
I just see an equation hmmm could it be the x.

You might be interested in
Spencer needs 2 gallons of paint to create a mural. He has 3/8 gallon of yellow and 1/4 gallon of blue paint. Drag amounts of pa
boyakko [2]

Answer:

He currently has 5/8 of a gallon. He needs 11/8 more paint to finish his mural.

Add 11/8 gallons or 5/4 and 1/8 of a gallon.

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Write and equation of the translated or rotated graph in general form (picture below)
WINSTONCH [101]

Answer:

The answer is hyperbola; (x')² - (y')² - 16 = 0 ⇒ answer (a)

Step-by-step explanation:

* At first lets talk about the general form of the conic equation

- Ax² + Bxy + Cy²  + Dx + Ey + F = 0

∵ B² - 4AC < 0 , if a conic exists, it will be either a circle or an ellipse.

∵ B² - 4AC = 0 , if a conic exists, it will be a parabola.

∵ B² - 4AC > 0 , if a conic exists, it will be a hyperbola.

* Now we will study our equation:

 xy = -8

∵ A = 0 , B = 1 , C = 0

∴ B² - 4 AC = (1)² - 4(0)(0) = 1 > 0

∴ B² - 4AC > 0

∴ The graph is hyperbola

* The equation xy = -8

∵ We have term xy that means we rotated the graph about

  the origin by angle Ф

∵ Ф = π/4

∴ We rotated the x-axis and the y-axis by angle π/4

* That means the point (x' , y') it was point (x , y)

- Where x' = xcosФ - ysinФ and y' = xsinФ + ycosФ

∴ x' = xcos(π/4) - ysin(π/4) , y' = xsin(π/4) + ycos(π/4)

∴ x' = x/√2 - y/√2 = (x - y)/√2

∴ y' = x/√2 + y/√2 = (x + y)/√2

* Lets substitute x' and y' in the 1st answer

∵ (x')² - (y')² - 16 = 0

∴ (\frac{x-y}{\sqrt{2}})^{2}-(\frac{x+y}{\sqrt{2}})^{2}=

 ( \frac{x^{2}-2xy+y^{2}}{2})-(\frac{x^{2}+2xy+y^{2}}{2})-16=0

* Lets open the bracket

∴ \frac{x^{2}-2xy+y^{2}-x^{2}-2xy-y^{2}}{2}-16=0

* Lets add the like terms

∴ \frac{-4xy}{2}-16=0

* Simplify the fraction

∴ -2xy - 16 = 0

* Divide the equation by -2

∴ xy + 8 = 0

∴ xy = -8 ⇒ our equation

∴ Answer (a) is our answer

∴ The answer is hyperbola; (x')² - (y')² - 16 = 0

* Look at the graph:

- The black is the equation (x')² - (y')² - 16 = 0

- The purple is the equation xy = -8

- The red line is x'

- The blue line is y'

6 0
3 years ago
Read 2 more answers
Romeo had pound of fudge left. He divided the remaining fudge into -pound 5 16 bags. Write and solve an equation that models the
lbvjy [14]

Answer:

3/4     /     5/16

Step-by-step explanation:

3/4     /     5/16   =  15/2 pound bags

8 0
2 years ago
Which of the following functions has the function rule y = x +4?
Alexus [3.1K]

Replace x with the given values and solve for y.

The answer is:

f(-3,1),(0,4), (2, 6))

7 0
2 years ago
Simplify the expression. 7m^3 + 2 3/4 - 6m^3​
Greeley [361]

Answer:

m^3 + 2 3/4

Step-by-step explanation:

Change the order

7m^3 - 6m^3 + 2 3/4

m^3 + 2 3/4

5 0
2 years ago
Other questions:
  • The average of 8 numbers is 10. the average of 6 of the numbers is 12 what is the average of the other 2 numbers
    14·1 answer
  • Which description represents this equation? 7x – 2 = 33 A. Two times the quantity of seven less than a number equals thirty-thre
    8·1 answer
  • How do i solve 426 to the nearest ten
    8·2 answers
  • Please help I’m so confused Find: cos A
    14·1 answer
  • Find the values of the variables.
    10·1 answer
  • Which statement best describes the area of Triangle ABC shown below? A triangle ABC is shown on a grid. The vertex A is on order
    10·2 answers
  • The volume of a rectangular prism is 5058 cubic inches.
    6·1 answer
  • What's an equation that the answer would be x= -3?
    8·2 answers
  • Kelly runs a bakery that sells Chocolate Blizzards and Mint Breezes. The bakery must make at least 25 dozen and at most 45 dozen
    7·1 answer
  • PLS PLS PLS HELP!!!! THIS IS DUE TODAYYYYY!!!!!! NO LINKS, NO STEALING POINTS, AND ONLY CORRECT ANSWERS OR YOU WILL BE REPORTED!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!