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taurus [48]
3 years ago
14

i’m taking a test rn and it’s about domain and range and the equation is x = 2 just correct me if i’m right or wrong and can you

please help me with the answer

Mathematics
1 answer:
kherson [118]3 years ago
5 0

Answer:

I think you are correct

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One positive integer is 2 less than twice another. The sum of their squares is 628. Find the integers.
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▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

let one of the integers be x,

other one = 2x - 2

now, according to question :

  • {x}^{2}  + (2x - 2) {}^{2}  = 628

  • {x}^{2}  + 4 {x}^{2}  + 4 - 8  x = 628

  • 5 {x}^{2}  - 8x = 628 - 4

  • 5 {x}^{2}  - 8x = 624

  • 5 {x}^{2}  - 8x - 624  = 0

  • 5 {x}^{2}  - 60 x+ 52 x- 624 = 0

  • 5x(x - 12) + 52(x - 12) = 0

  • (5x + 52)(x - 12) = 0

now, since the Integers are positive so the value obtained from (5x + 52) = 0 can't hold true.

so, x - 12 = 0

  • x = 12

the first number is :

  • x = 12

second number is :

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  • (2 \times 12) - 2

  • 24 - 2

  • 22
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3 years ago
What value is missing from the table?
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The value that is missing from the table is, $7.00
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Using the diagram, explain why y =2x+1 and y=2x-3 have no solutions.
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Because they have the same inclination so if we try to draw them on a diagram they will be parallel to each other.

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If f(x) = 6 - 5x, what is f(x)^-1? (check attachment)
SCORPION-xisa [38]

f(x) = 6-5x

y = 6-5x .... replace f(x) with y

x = 6-5y .... swap x and y; solve for y

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f^{-1}(x) = \frac{6-x}{5} ... replace y with the inverse function notation

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3 years ago
(03.01 MC) The length of a rectangle is 5 units and its width is 4 units. What is the approximate length of the diagonal of the
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Answer:

√41, or about 6.4 units

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