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Nat2105 [25]
3 years ago
12

Each interior angles of a polygon measures 157.5. What is n, the total number of sides in this polygon

Mathematics
1 answer:
WITCHER [35]3 years ago
7 0
The exterior  angles = 180 - 157.5 = 22.5 degrees
the exterior angles of all polygons add up to 360 degrees
therefore the total number of sides n = 360 / 22.5 = 16
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Is 12.89 irrational
STatiana [176]

No.  It's the ratio of  1,289  to  100 .

Also, it can be written as a fraction with whole numbers
on top and bottom, like this:    1289 / 100 .

Also, it can be written down on paper completely, using
digits and a decimal point or fraction bar.  (You did that.)

Any one of these three facts makes it a rational number.

7 0
4 years ago
Riley makes a mistake in step 2 while doing her homework. What was her mistake? StartFraction x Over x squared minus 5 x + 6 End
kobusy [5.1K]

Answer:

The answer is:

She used the wrong common denominator

Step-by-step explanation:

Solving the given equation

\frac{x}{x^2-5x+6}+\frac{x}{x+3}\\\\Step 1: \frac{x}{(x-2)(x-3)}+\frac{x}{x+3}\\Step2: \frac{x}{(x-2)(x-3)}+\frac{x(x-2)}{(x-2)(x+3)}\\Step3:\frac{x(x+3)+x(x-2)(x+3)}{(x-2)(x-3)(x+3)}

Lets consider the steps given in the question:

Step2: \frac{x}{(x-2)(x+3)}+\frac{3(x-2)}{(x-2)(x+3)}

Step3: \frac{x+3(x-2)}{(x-2)(x+3)}\\

Lets compare both solutions:

In the original solution, the denominator of first term is (x-2)(x-3)

In the solution given in the question, the denominator of first term is (x-2)(x+3).

So the mistake she did in step 2 was that she change the sign of 3 in (x-3) from negative to positive, due to which she gets the wrong common denominator shown in Step 3.

7 0
4 years ago
Read 2 more answers
Can someone help me with this plz and thank u
Paul [167]

Answer:

1. B

2.C

3.A

4.C

5. B

6.D (because all the other ones are wrong and i cant see D)

i hope this helped!! :)

5 0
3 years ago
Two similar triangles are shown. Triangle RST was , then dilated, to create triangle ZXY. plzzzzzz
elena-14-01-66 [18.8K]

Triangle RST was ____________, then dilated, to create triangle ZXY.

answer is translated

8 0
3 years ago
Can someone please solve for x:
BabaBlast [244]
Make the denominator into 10x:
5x/10x +20/10x=x(x+4)/10x
5x+20=x(x+4)
5x+20=x²+4x
x²-x-20=0
(x-5)(x+4)=0
x=5 or -4
the third choice is correct. 
3 0
3 years ago
Read 2 more answers
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