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guapka [62]
3 years ago
7

Which of the following quadratic equations is solved correctly?

Mathematics
1 answer:
vazorg [7]3 years ago
5 0

Answer:

Its D

Step-by-step explanation:

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The first equation from the system of equations is graphed. Graph the second equation to find the solution of the system of equa
Marianna [84]

Answer:

its D

Step-by-step explanation:

did it on ed2020

7 0
3 years ago
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game has three possible outcomes: win, lose, or tie. The probability of a win is 0.4, the probability of a loss is 0.1, and the
lesya692 [45]
I think it is 1/10 or 10% (This is also 0.1) of not winning the game
4 0
3 years ago
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Consider two identical iron nails: one nail is heated to 95 °c, the other is cooled to 15 °c. the two nails are placed in a coff
Angelina_Jolie [31]
The heat released or absorbed by a substance is calculated through the equation,
     H = mcpdT

where H is teh heat,
   m is the mass,
  Cp is the specific heat, and 
  dT is the temperature difference

In this item, since both nails are identical, m and cp for both nails are equal such that the equation can be expressed as,
    mcp(95 - x) = mcp(x - 15)

where x is the final temperature. Solving for the value of x from the equation derived above will give us a final answer of 55 degrees C. 

Answer: 55°


3 0
3 years ago
Solve for the following equation step by step and justify your steps when using an exponential property.
Flura [38]
(7^x)^4 is equal to 7^(4x).

7^2 * 7^3 is equal to 7^(2+3) which is equal to 7^5.

7^5 / 7^(3x) is equal to 7^(5 - 3x).

you wind up with 7^(4x) is equal to 7^(5 - 3x)

this is true if and only if 4x = 5 - 3x.
8 0
3 years ago
A scientist wants to find the radius, in feet, of this hemispherical dome. He found that the surface area of the entire sphere c
skelet666 [1.2K]
The surface area of a sphere by definition is given by:
 A = 4 * π * r ^ 2
 Where,
 r: radius of the sphere.
 Substituting the values we have:
 294 = 4 * π * r ^ 2
 We cleared the radio:
 r ^ 2 = (294) / (4 * π)
 Answer:
 An equation that I could use to find the dome's radius is:
 A. r2 = 294 square feet ÷ 4π
7 0
4 years ago
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