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3 years ago

[ASPS]WILL GIVE BRAINLIEST

Mathematics

1 answer:

Leya [2.2K]3 years ago

3 0

Answer:

sum of exterior angles of a polygon = 360°

therefore,

x + 5 + x + 10 + 3x - 8 + 5x + 10 = 360°

10x + 17 = 360°

x + 17 = 360 ÷ 10 = 36

x = 36 - 17 = 19

x = 19

<h3>rounding off 19 to nearest hundred = 20 </h3>

value of x will be 20

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Pllllllllllz help number 17

Monica [59]

I will help but I’m dumb sorry

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3 years ago

Suppose that 1 month before the election a random sample of 500 registered voters are surveyed. From this sample 270 indicate th

Aleonysh [2.5K]

Answer:

[ 0.4964, 0.5836 ]

Step-by-step explanation:

Data provided in the question:

Total sample size = 500

person voting for smith = 270

thus,

P( person voting for smith ), p = $\frac{270}{500}$ = 0.54

Confidence level = 95%

now,

standard error, SE = $\sqrt{\frac{p(1-p)}{n}$

SE = $\sqrt{\frac{0.54(1-0.54)}{500}$

SE = 0.0223

now,

Confidence interval = p ± ( z × SE )

here,

z value for 95% confidence interval is 1.96

Confidence interval = [ 0.54 - ( 1.96 × 0.0223 ), 0.54 + ( 1.96 × 0.0223 ) ]

= [ 0.54 - 0.0436 , 0.54 + 0.0436 ]

= [ 0.4964, 0.5836 ]

8 0

3 years ago

Find each product (4x - 5)(2x5 + x3 – 1)

TEA [102]

Answer:

8x^6-10x^5+4x^4-5x^3-4x+5

Step-by-step explanation:

Lest distribute the expression given

this is multiply the first term (4x) with the longer expression (2x^5+x^3-1) and then, multiply the second term (-5) with the longer expression (2x^5+x^3-1).

When the above is finish, simply sum all together.

4x* (2x^5+x^3-1)= 8x^6 +4x^4-4x

-5*(2x^5+x^3-1)=-10x^5-5x^3+5

The sum of all together (respecting the coefficient they belong) is shown:

8x^6-10x^5+4x^4-5x^3-4x+5

8 0

4 years ago

4/7(21/8 x + 1/2) = -2(1/7 - 5/28x)<br> What is x in decimal form?

frez [133]

Answer:

x= $1.22930$

Step-by-step explanation:

47(218 x+12 ) =−2(17 −528 x)

Simplify 47(218 x+12 ) : 327(21x+4) 327(21x+4) =−2(17 −528 x)

Multiply both sides by 7(21x+4)

327(21x+4) · 7(21x+4)=−2(17 −528 x)· 7(21x+4)

Simplify, 32=−14(17 −528 x)(21x+4)

Solve 32=−14(17 −528 x)(21x+4): x=32+4√589105 , x=32−4√589105 x=32+4√589105 , x=32−4√589105

8 0

3 years ago

Read 2 more answers

Rachel spends 1/4 of her money

astra-53 [7]

Step-by-step explanation:

Let's start by defining our term:

How much she had at the beginning = B

Now let's edit that value like the problem says

B - B/4 - B/8 = 40

Let's multiply everything by 8 to get rid of any denominators

8B - 2B - B = 320

5B = 320

B = 64

Answer:

Rachel had $64 at the beginning.

4 0

3 years ago