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algol [13]
4 years ago
14

Find the value of x

Mathematics
1 answer:
anzhelika [568]4 years ago
5 0

The sum of the measures of angles in the polygon with n angles is

180°(n - 2)

We have an octagon → n = 8.

The sum of the measures of angles in an octagon is

180°(8 - 2) = 180°(6) = 1080°

The equation:

x + 139 + 140 + 125 + 116 + 152 + 2x + 143 = 1080

3x + 815 = 1080      <em>subtract 815 from both sides</em>

3x = 265     <em>divide both sides by 3</em>

<h3>x = 88 1/3</h3>
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X + 8 &gt; 8<br> plz help and plz hurry<br> if right you will get brain list
DaniilM [7]

Answer:

x > 0

Step-by-step explanation:

Given

x + 8 > 8 ( subtract 8 from both sides )

x > 0

3 0
3 years ago
Can anybody help me with this problem 324 divided by 2,456?
UNO [17]

Answer:

0.13192182

Step-by-step explanation:

324/2456

To solve, divide.

324/2456

This equals:

0.13192182

Hope this helps!

3 0
4 years ago
While on vacation in Rockport, Cole went out for a dinner that cost $30. If sales tax in Rockport is 10% and Cole left a 20% tip
Fantom [35]

Answer:

$39

Step-by-step explanation:

To calculate the total cost of his meal, add the subtotal ($30), the tax on subtotal ($30 X 10%) and the tip ($30 X 20%).

Convert all percentages to decimals to multiply.

Finding tax:

10% = 0.1

Tax = $30 X 0.1 = $3

Finding tip:

20% = 0.2

Tip = $30 X 0.2 = $6

Subtotal + Tax + Tip

= $30 + $3 + $6

= $39

The total cost of his meal was $39.

4 0
3 years ago
How many solutions does the following system of equations have?
Lunna [17]

Answer:

The answer is "no solution" so it should be: C. Zero

Step-by-step explanation:

Solve for the first variable (A letter used to represent a number value in an expression or an equation) in one of the equations, then substitute the result into the other equation.

5 0
3 years ago
A company believes that it controls more than 30% of the total market share for one of its products. To prove this belief, a ran
stiv31 [10]

Answer: 1.24

Step-by-step explanation:

Let p be the population proportion of the total market share for one of its products.

As per given , we have

p=0.30

Sample size : n= 144

Sample proportion : \hat{p}=\dfrac{50}{144}=0.347222222222\approx0.3472

Formula for z-value :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

i.e. z=\dfrac{0.3472-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{144}}}

Simplify ,

. z=1.2359861303\approx1.24

Hence, the observed z value would be <u>1.24</u> .

4 0
3 years ago
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