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PilotLPTM [1.2K]
3 years ago
11

What figures have rotation symmetry? PLEASE HELP I NEED A GOOD GRADE

Mathematics
2 answers:
Darina [25.2K]3 years ago
6 0

if set up like

1 2

3 4

its 1 and 4

1 has 90deg rotationals and 4 has 180 the other two don't.

Ivanshal [37]3 years ago
5 0
The figures on the top left and the bottom right have rotational symmetry.
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-5(1 - r) - 2<br> Find r
Grace [21]

Answer:

-5+5r-2 -->

--> 5r-7 <--

Explanation --

Distribute from the parentheses, of course excluding the -2 because it isn't involved, and you'll get --> -5 + 5r -2

Simplify by putting the like terms together (subtract) -->

5r -7 (you get -7 by doing -5-2, and you leave 5r by itself since it doesn't have anything more to simplify with or has any other like term)

So, the final, simplified answer -->

5r-7

Hope this helps!! Have a nice day! :)

7 0
3 years ago
What is the distance between (-4,6) and (3,-7)
melomori [17]
(-7 , 13) is the distance
6 0
3 years ago
Find the solution set of the inequality:<br><br> 82 + 2 &gt; 34<br><br> SOMEONE PLS HELP
Romashka [77]

Answer:

82+2>34

84>34

True

I hope this helps :)

6 0
3 years ago
Write an algebraic expression for each verbal description.
BaLLatris [955]

Step-by-step explanation:

3r + (9 + 2r + 1)

this can be simplified :

3r + (9 + 2r + 1) = 3r + 2r + 9 + 1 = 5r + 10

7 0
2 years ago
The area of a field shaped like a right triangle is 750yd^2.One leg of the field is fenced with wood costing $5/yd. the remainde
Elenna [48]
Assume that
 a and b = the two legs of the right triangle. 
 c =  the hypotenuse.

The area of the right triangle is 750 yd², therefore
(1/2)*a*b = 750
ab = 1500               (1)

The perimeter is 150yd, therefore
a + b + c = 150         (2)

Let the side fenced with wood be a, at $5/yd.  Sides b and c are fenced with steel at $10/y. The total cost is $1200, therefore
 5a + 10b + 10c = 1200            
or
a + 2b + 2c = 240         (3)

From (2), obtain 
c = 150 - a - b              (4)

Substitute (4) into (3)
a + 2b + 2(150 - a - b) = 240
-a + 300 = 240
a = 60

From (1), obtain
60b = 1500
b = 25

From (4), obtain
c = 150 - 60 - 25 = 65

Answer:
A. The length of the leg fenced with wood is 60 yd.
B.  The length of the leg fenced with steel is 25 yd.


5 0
3 years ago
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