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Mathematics 22 Online
AleynaBlack:

What is the rational number equivalent to 1 point 28 with a bar over 28? (1 point)

AleynaBlack:

can someone help me with this

Vocaloid:

1.282828… continued let x = 0.282828 (repeated) Therefore, 100x = 28.282828 (repeated) Subtracting 100x - x = 99x = 28 (notice how the decimal part cancels out) If 99x = 28, then x = 28/99 Your original number is 1.2828(repeated) so it’s 1 + x, or 1 + 28/99 Convert to an improper fraction

Vocaloid:

Shortcut method: Because the repeating part 28 has 2 digits, we write two nines (99) and the repeating part is 28/99 This works for any repeating decimal

AleynaBlack:

Line segment CD is shown on a coordinate grid: A coordinate plane is shown. Line segment CD has endpoints 1 comma 2 and 1 comma negative 1. The line segment is rotated 90 degrees counterclockwise about the origin to form C′D′. Which statement describes C′D′? (4 points)

Vocaloid:

Statements?

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