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2 years ago

Expand the expression -11(30 – 2d) using the Distributive Property.

Mathematics

2 answers:

Goshia [24]2 years ago

8 0

Answer: -330 + 22d

Step-by-step explanation:

Apply distributive law: a(b-c)=ab-ac

Savatey [412]2 years ago

6 0

Answer:

$-330+22d$ , or the other way around

Step-by-step explanation:

$-11*30=-330$

$-11*-2d=22d$

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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 ]

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2 years ago

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DaniilM [7]

Factor each completely 3r^2+7r
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3 years ago

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timama [110]

Answer:

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Answer:

Step-by-step explanation:

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