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Bumek [7]
3 years ago
7

Plzzzz need answers​

Mathematics
1 answer:
earnstyle [38]3 years ago
3 0

Answer:

1. (x,y)→(y,-x)

2. (x,y)→(-y,x)

3. (x,y)→(-x,-y)

Step-by-step explanation:

1. Rotation 90° clockwise (or 270° counterclockwise) about the origin changes x into y and y into -x, so it has the rule

(x,y)→(y,-x)

2.  Rotation 90° counterclockwise (or 270° clockwise) about the origin changes x into -y and y into x, so it has the rule

(x,y)→(-y,x)

3.  Rotation 180° clockwise  about the origin changes x into y and y into -x, so it has the rule

(x,y)→(-x,-y)

Here you can apply rotation by 90° clockwise twice, so

(x,y)→(-y,x)→(-x,-y)

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Jan bought a blazer for $39.90. The price of the blazer was $38. What sales-tax rate was she charged for this blazer percentage
Nadya [2.5K]
The question asks for sales tax rate. Sales tax is 39.90-38=1.90 and that's taxed onto the original $38 so 1.9/38=0.05
5% tax on the blazer
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3 years ago
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Pls help me,this is Canadian MO 1998 question,i'm very confuse with this​
dybincka [34]

The solution to the equation is x = 1.62

<h3>How to solve the equation?</h3>

The equation is given as:

x =\sqrt{x\ -\ \frac{1}{x}}+\sqrt{1-\ \frac{1}{x}}

Next, we split the equations as follows:

y = x

y =\sqrt{x\ -\ \frac{1}{x}}+\sqrt{1-\ \frac{1}{x}}

Next, we graph the equations (see attachment)

From the attached graph, the equations intersect at

(x, y)= (1.62, 1.62)

Remove the y value

x = 1.62

Hence, the solution to the equation is x = 1.62

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brainly.com/question/2972832

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1 year ago
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Each of 4 siblings ate 3/4 of cake,what is the total amount of cake the siblings ate?
ivanzaharov [21]

Answer:

3

Step-by-step explanation

4 is made into a fraction by putting it over one like 4/1 then multiply it by

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3 0
3 years ago
How to solve this equation?
Jet001 [13]

Answer:

7

Step-by-step explanation:

2 ÷ 2/7

We use copy dot flip

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Rewrite to make the math easier

2/2 * 7/1

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4 years ago
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Novay_Z [31]

Answer: I thinks it's 193.313

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Area of pentagon is = 5/2 x s x a

= 5/2 x 11.7 x 214.1

=6262.425 square centimetres.

Example 2 : Find the area of a pentagon of side 11.7 yards and apothem length 14.1 yards ?

Solution :

Given,

s = 11.7 yds

a = 14.1 yds

Area of a pentagon

= 193.313 yds

3 0
3 years ago
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