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3 years ago

△QRS is rotated about point P to △Q′R′S′ .

Mathematics

1 answer:

swat323 years ago

6 0

A rotation is a transformation that preserves figure shape, figure sizes, angles and lengths.

Therefore,

option A is false, because rotation preserves sizes;
option B is false, because rotation doesn't change the figure size;
option C is true, because rotation preserves figure angles;
option D is true, because rotation preserves lenghts of segments.

Answer: option C and D.

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AlladinOne [14]

Answer

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2 years ago

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stich3 [128]

Answer:

$x = 1 + \sqrt{2} \ \ or \ 1- \sqrt{2}$

Step-by-step explanation:

Given;

x² - 2x - 1 = 0

Solve by completing the square method;

⇒ take the constant to the right hand side of the equation.

x² - 2x = 1

⇒ take half of coefficient of x = ¹/₂ x -2 = -1

⇒ square half of coefficient of x and add it to the both sides of the equation

$x^2 + (-1)^2 = 1 + (-1)^2$

$(x-1)^2 = 1 + 1\\\\(x-1)^2 = 2\\\\$

⇒ take the square root of both sides;

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Therefore, option B is the right solution.

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2 years ago

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leva [86]

Answer: 0

Step-by-step explanation:

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2 years ago

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sveta [45]

Part A:
y=mx+b
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Part B:
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2 years ago

In a bank account a paid out expense is called a debit and a deposit is called a credit. Would you use positive or negative inte

Allisa [31]

Answer:

positive integer

Step-by-step explanation:

In a bank account,

A paid out expense is called as debit

A deposit is called as credit

To find: sign used to represent credits

Solution:

Integers denote a set of natural numbers, their negative counterpart, and 0.

As credit denotes the amount deposited, the positive integer is used to denote credits.

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