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2 years ago

7 +(3 x ( 3 + 5)?) + 5

Mathematics

1 answer:

-Dominant- [34]2 years ago

7 0

Answer:

Step-by-step explanation:

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Evaluate -3.25 - 2.75z for z = -4.

Usimov [2.4K]

The answer is $7.75 -3.25-2.75x-4=$7.75

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2 years ago

A carpenter cut a 6 ½-ft. board into 3/4-ft. sections. What is the number of whole sections he cut?

Aliun [14]

Answer:

Step-by-step explanation:

This man is cutting 6.5 ft of wood into pieces that are .75 ft long.

Divide 6.5/.75 and there's ur answer chief

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2 years ago

What’s the answerrr..........

Afina-wow [57]

Answer:

D.90

the answer is 90 because it only flips once

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2 years ago

(1 point) A random sample of 600 movie goers in Flagstaff found 252 movie goers who had bought popcorn on their last visit. Find

garik1379 [7]

<u>Answer-</u>

A 95% confidence interval for the true percent of movie goers is 36.41% to 44.25%

<u>Solution-</u>

Given,

n = 600 (sample size)

x = 252 (number of people who bought)

Confidence interval = 95%, so z = 1.96

We know that,

$\mu = M\pm Z(SE)$

where,

M = sample mean

Z = Z statistic determined by confidence level

SE = standard error of mean

Calculating the values,

$M=\frac{x}{n} =\frac{242}{600} =0.4033$

$Z=1.96$ from the tables

$SE=\sqrt{\frac{M\times (1-M)}{n}}$

$\Rightarrow SE=\sqrt{\frac{0.4033\times (1-0.4033)}{600}}=0.02$

Putting all the values in the formula,

$\mu = M\pm Z(SE)$

$\mu = 0.4033\pm 1.96(0.02)$

$=0.4033\pm 0.0392$

$=0.4425, 0.3641$

$= 44.25\%,36.41\%$

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3 years ago

A chance with probability 1 is certain to happen true or false

KIM [24]

Probability always adds up to 1 so, if there is only one choice, the chance that it will happen is 100% (1 out of 1) so true

Hope this helps! :)

3 0

2 years ago