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4 years ago

(20 points) (literal equations)

Mathematics

2 answers:

maksim [4K]4 years ago

5 0

Answer:

Correct option is:

x = y − 4

Step-by-step explanation:

We have to solve y=x+4 for x

y=x+4

or x+4=y

subtracting both sides by 4

x+4-4=y-4

x=y-4

Hence, Correct option is:

x = y − 4

Nataly [62]4 years ago

4 0

y = x + 4

move +4 to the other side

sign changes from +4 to -4

y-4= x+4-4

y-4= x

Answer:

x=y-4

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Answer:

Step-by-step explanation:

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4 years ago

lighting if a 25-foot-tall house cast a 75-foot shadow at the same time that a streetlight casts a 60-foot shadow how tall is th

jolli1 [7]

Answer:

The street light is 20 feet tall.

Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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Read 2 more answers

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garik1379 [7]

Answer-

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

Solution-

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,

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

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

$=0.4033\pm 0.0392$

$=0.4425, 0.3641$

$= 44.25\%,36.41\%$

5 0

4 years ago