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vova2212 [387]
4 years ago
7

Can you help me plz!!!!

Mathematics
2 answers:
BlackZzzverrR [31]4 years ago
5 0
The first one is not and the third one is and two is and the fourth one is not 
Setler [38]4 years ago
4 0
First one, equivalent. (because two times 9z is eighteen z and two times 9w is eighteen w. And eighteen z plus 12z is thirty) second one is equal for similar reasons. Third one is also equal. The last one is not equal.
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Please help me with question 3
zzz [600]
My gut tells me its C
5 0
3 years ago
For brainily please help
OLga [1]

Answer:

The value of Z should be 11.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Thank you very much anh you
Neko [114]

Hello from MrBillDoesMath!

Answer:

See discussion below

Discussion:

#4

The sum of the interior angles of a polygon of n sides is (n-2)* 180. As the polygon in #4 has 7 sides , the sum of the interior angles is (7-2)*180 = 5 * 180 = 900.

We can also compute the sum of the interior angles by adding up each of the angles (expressed in terms of x)  shown in #4. Starting at the top of the polygon and proceeding counterclockwise gives:

900 =  (8x +34) + (10x+21)+(9x+30)+(7x+45)+(5x+44)+(12x+13)+(6x+29)  =>

           (8x + 10x+9x+7x+5x+12x+6x) + (34+21+30+45+44+13+29)  =

           57x                                            + 216

This simplifies to

900 =  57x + 216                => subtract 216 from both sides

900-216 = 57x                    => 900-216= 684

684= 57x                            => divide both sides by 57

684/57  = x                         => as 684/57 = 12

x = 12

The diagram has makes repeated use of the same variable for vertices. That is, the diagram shows 4 P's, 1 Q, 2 R's, 0 S's, and 1 T making it impossible to determine the values of some angles.  For example, consider m RST -- whatever that means.

#5 uses the same ideas but the vertices are properly  labeled (I'll leave the grunt of determining the  individual angles to you but here are the main points).

Sum of interior angles = (7 -2) * 180 = 5 * 180 = 900.

900 =  (8x+62) + (7x+66)+(5x+83)+(6x+55)+(10x+42)+(8x+45)+(4x+67)  =>

900 =   (8x + 7x +5x+6x+10x+8x+4x) + (62+66+83+55+42+45+67)

900=     48x                                        +  420             =>

900 -420 = 48x                                                          =>   subtract 420

480  = 48x                                                                  =>   divide by 48

x = 480/48 = 10

Thank you,

MrB

6 0
4 years ago
Please help me find the distance between the points (5,4) and (1,-2) and express the answer in simplest radical form.
finlep [7]
The distance between two points can be calculated using the following formula:
distance = sqrt [ (x2-x1)^2 + (y2-y1)^2]

Now, we are given the two points (5,4) and (1,-2)
Substitute with the given points in the above equation to get the distance as follows:
distance = sqrt [(1-5)^2 + (-2-4)^2]
distance = sqrt [16+36] = sqrt[52]
distance = 2√13 = 7.2111 units

7 0
3 years ago
Please help me!!<br> A.<br> B.<br> C.<br> D.<br> E.<br> F.
alexira [117]

The answer is:

a, e, f

3 0
3 years ago
Read 2 more answers
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