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Leno4ka [110]
3 years ago
12

Which relationship has a domain of real numbers?

Mathematics
1 answer:
babunello [35]3 years ago
7 0

Answer:Domain: all x-values that are to be used (independent values).

Step-by-step explanation:The domain is the set of all first elements of ordered pairs (x-coordinates). The range is the set of all second elements of ordered pairs (y-coordinates). Only the elements "used" by the relation or function constitute the range. Domain: all x-values that are to be used (independent values).

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Use a system of linear equations with two variables and two equations to solve. A number is 9 more than another number. Twice
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Answer:

  (x, y) = (3, 12)

Step-by-step explanation:

Using the given variable definitions, we can write the equations ...

  y = x + 9

  2(x +y) = 30

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Solving the second equation for y, we have ...

  y = 15 -x

Substituting this into the first equation gives ...

  15 -x = x +9

  6 = 2x . . . . . . . . . add x-9

  3 = x . . . . . . . . . . divide by 2

  y = 3+9 = 12 . . . . substitute into the first equation

The numbers are (x, y) = (3, 12).

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2 years ago
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Answer:

y= -2/7x +4

Step-by-step explanation:

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3 years ago
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Given that x is a number greater than 0, Molly conjectured that x3>3x+3 . Which value is a counterexample to Molly's conjectu
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You didn't give any options but I'll try 2 
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3 years ago
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Find X and QT. The shape is a Rhombus
kompoz [17]

Answer:

See below ~

Step-by-step explanation:

Sides of a rhombus are equal.

⇒ QT = TS

⇒ x² - 4x - 10 = 6x + 14

⇒ x² - 10x - 24 = 0

⇒ x² + 2x - 12x - 24 = 0

⇒ x (x + 2) - 12 (x + 2) = 0

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⇒ x = -2 or x = 12

Substitute both values and see which gives a positive value for QT :

<u>When x = -2</u> :

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<u>When x = 12</u> :

  • QT = (12)² - 4(12) - 10
  • QT = 144 - 48 - 10
  • QT = 86

The 2 possible answers are :

  • x = -2, QT = 2
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2 years ago
Why would I need to use square roots and cube roots?
Aleks04 [339]

Answer:

Square roots and cube roots can be used to find missing dimensions of cylinders, cones, and spheres.

Step-by-step explanation:

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