Answer:
This is a function because each x value has a different y value. If one of x values would of had two different y values then it would of not have been a function
Step-by-step explanation:
You basically just divide what ever number by 2
Answer:
x = 5, x = -5 are your answers
Step-by-step explanation:
First, FOIL (First, Outside, Inside, Last)
(x + 4)(x - 4) = 9
x(x) = x²
x(-4) = -4x
4(x) = 4x
4(-4) = -16
x² - 4x + 4x - 16 = 9
Simplify. Combine like terms
x² (-4x + 4x) - 16 = 9
x² - 16 = 9
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Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.
First, add 16 to both sides
x² - 16 (+16) = 9 (+16)
x² = 25
Next, isolate the x completely by rooting both sides
√(x²) = √(25)
x = √25
x = √25 = √(5 x 5)
x = √25 = √(-5 x -5)
x = 5 , -5
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x = 5, x = -5 are your answers
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Answer:
6
Step-by-step explanation:
In equilateral triangle, all the sides are congruent.
3x - 6 = 12
Add 6 to both sides
3x = 12 + 6
3x = 18
Divide both sides by 3
x = 18/3
x = 6
