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avatar+1176 

 

What are the coordinates of the center of the circle shown?

 

A) 3

B) (-2, 1)

C) (-1, 2)

D) (1, -2)

E) (2, -1)

 

 

 

 

 

 

A (1, 1) 

B (2, 3) 

C (5, 3)

 

Parallelogram ABCD has the coordinates shown. 

 

Find the coordinates of point D.

 

A) (5, 2)

B) (4, 3)

C) (4, 1)

D) (4, 2)

E) (3, 1)

 

 

 

 

 

Which point is in quadrant II?

 

A) A

B) B

C) C

D) D

E) none of these.

 Aug 28, 2019
 #1
avatar+104684 
+2

First one

E. (2, -1)

 

Last one 

C)  C

 

 

cool cool cool

 Aug 28, 2019
 #2
avatar+104684 
+2

Second one

 

A (1, 1) 

B (2, 3) 

C (5, 3)

 

The first thing to do is to plot these here : https://www.desmos.com/calculator/viqqgx48qv

 

We can find the coordinates of D  by noting  that  we had to subtract 1 from the x coordinate of (2,3)   and 2 from the y coordinate of (2,3)  to get (1,1)

 

This implies that if we  subtract 1 from the x coordinate of (5, 3)  and 2 from its y coordinate we get  

(5 - 1, 3 - 2)  =  (4, 1)  =   D

 

See here : https://www.desmos.com/calculator/ciuabtpszj

 

 

cool cool cool

 Aug 28, 2019

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