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Varvara68 [4.7K]
3 years ago
5

What are the solutions to the equation x2 − 1 = 399?

Mathematics
2 answers:
Mila [183]3 years ago
8 0

Answer:A

Step-by-step explanation:

mihalych1998 [28]3 years ago
3 0

Good evening ,

Answer :

A.

x = ±20

Step-by-step explanation:

x² − 1 = 399 ⇔ x²= 400 ⇌ x² = 20² ⇌ x² − 20² = 0 ⇌ (x-20)(x+20) = 0

⇌ x = 20 or x = -20.

:)

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Step-by-step explanation:

Apparently the ordered pairs are ...

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What is the Domain and range of (3,4)(5,7)(-3,8)(2,0)(1,3)
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The domain is all x-values.

The range is all y-values.

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8 0
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Fill in the blanks below.
Dmitry_Shevchenko [17]

Answer:

a) <em>Slope of the line m = ∞</em>

<em>b) Slope of the line  m =0</em>

Step-by-step explanation:

<u><em>Explanation:-</em></u>

<u><em>Step(i):-</em></u>

<em>Given points are ( 7,7) and (7,-8)</em>

<em>Slope of the line</em>

<em>                      </em>m = \frac{y_{2} - y_{1} }{x_{2}-x_{1}  }<em />

<em>                     </em>m = \frac{-8-7 }{7-7  } = \frac{-15}{0} = infinite<em />

<em>                   m = ∞</em>

<u><em>Step(ii):-</em></u>

Given points are (-6,7) and (9,7)

<em>Slope of the line</em>

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<em>                     </em>m = \frac{7-7  }{9-(-6)  } = \frac{0}{15} = 0<em />

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Answer:

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