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2 years ago

Let's find what percent of the total number of quantities is the given number or quantities?

Mathematics

1 answer:

astraxan [27]2 years ago

3 0

Answer:

a. 20

b. 30

c. 75

b. 600 / 2000 * 100% (Change it to same unit)

3 / 10 * 100%

30%

You can slove every question by this method.

and dont forget to give me the brainest.

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Simplify: 3(x+4) -6x

Stella [2.4K]

Answer:

-3x + 12

Step-by-step explanation:

Distribute the 3 to the numbers in the parenthesis.

3x + 12 -6x

-3x + 12

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2 years ago

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Historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the pre

artcher [175]

Answer: The proportion of new car buyers that trade in their old car has statistically significantly decreased.

Step-by-step explanation:

Since we have given that

p = 48% = 0.48

n = 115

x = 46

So, $\hat{p}=\dfrac{46}{115}=0.40$

So, hypothesis would be

$H_0:\ p=\hat{p}\\\\H_a:p$

So, test value would be

$z=\dfrac{p-\hat{p}}{\sqrt{\dfrac{p(1-p)}{n}}}\\\z=\dfrac{0.48-0.40}{\sqrt{\dfrac{0.48\times 0.52}{115}}}\\\\z=\dfrac{0.08}{0.0466}\\\\z=1.72$

At 10% level of significance, critical value would be

z= 1.28

Since 1.28 < 1.72

So, we will reject the null hypothesis.

Hence, the proportion of new car buyers that trade in their old car has statistically significantly decreased.

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2 years ago

when comparing salaries,which unit rate is better is better: $3,250/month or $4,000/momth? explain answer

MA_775_DIABLO [31]

4,000/month because you would be getting $750 more than the other salary(that's what i think the answer is)

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2 years ago

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Sabrina built a model of one of the office buildings in Dallas shaped like a rectangular prism. The model was 4.1 inches wide, 5

Helen [10]

Answer:

dont kn

Step-by-step explanation:

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2 years ago

Answer to 42.7 -(-12.4)

Aleks [24]

42.7−(−12.4)

=42.7−(−12.4)

=42.7+12.4

=55.1

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2 years ago