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3 years ago

Marco weighs 80 pounds. His bones make up 1/5 of his body weight. How much do his bones weight?

Mathematics

2 answers:

Afina-wow [57]3 years ago

6 0

80 /5 = 16

answer:

His bones weight 16 lbs

LenKa [72]3 years ago

3 0

His bones weigh 16 pounds. The way you solve this is by first making 1/5 a decimal 1/5=0.2. Then you just have to do 80*0.2=16 Hope this helps!

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A sports magazine claims that in a certain country, 45% of people like soccer A news channel asked 30 randomly selected people i

LiRa [457]

Answer:

Step-by-step explanation:

Hello!

The parameter of interest is "the population proportion of people that like soccer A news channel"= p

The hypothesis are:

H₀: p = 0.45

H₁: p ≠ 0.45

To study the population proportion you have to use the approximation of the standard normal distribution:

$Z= \frac{p'-p}{\sqrt{\frac{p(1-p)}{n} } }$ ≈ N(0;1)

A sample of n=30 was taken and surveyed, 18 of those answered positively, then the sample proportion is:

p'= 18/30= 0.6

The statistic under the null hypothesis is:

$Z_{H_0}= \frac{0.60-0.45}{\sqrt{\frac{0.45*0.55}{30} } } = 1.6514$

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3 years ago

Which of the following is the solution to the equation x + 6.8 = 53.5?

gregori [183]

X+6.8=53.5
x=53.5-6.8
=46.7

5 0

3 years ago

Read 2 more answers

Find an orderd pair (x,y) that is a solution to the equation 4x+y=9

Aleksandr [31]

Answer:

Below in bold.

Step-by-step explanation:

4x + y = 9

Let's put x = 0 then:

4(0) + y = 9

0 + y = 9

y = 9

So one. ordered pair that is a solution is (0, 9)

7 0

2 years ago

At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 36 m

Degger [83]

The probability that a randomly selected customer will have to wait between 32 minutes and 37 minutes is 59.81%

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Z score is given by:

z = (raw score - mean) / standard deviation

Given mean of 36 minutes and a standard deviation of 3 minutes.

For x = 32:

z = (32 - 36)/3 = -1.33

For x = 37:

z = (37 - 36)/3 = 0.33

P(-1.33 < z < 0.33) = P(z < 0.33) - P(z < -1.33) = 0.6179 - 0.0198 = 0.5981

The probability that a randomly selected customer will have to wait between 32 minutes and 37 minutes is 59.81%

Find out more on equation at: brainly.com/question/2972832

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7 0

2 years ago

Find the mean of the first 7 odd prime number?

bekas [8.4K]

Answer: 75/7 or 10.71 (rounded)

Step-by-step explanation:

Mean = Average

To find the average you should add all the numbers together and then divide it by the amount of numbers.

In this question, the formula is $\frac{n_1+n_2+n_3+n_4+n_5+n_6+n_7}{7}$

----------------------------------------------------------------------------------------

The list of the first 7 odd prime numbers:

3, 5, 7, 11, 13, 17, 19

Now, add them together

3+5+7+11+13+17+19=75

Divide the sum by 7

75÷7=75/7=10.71 (rounded)

Hope this helps!! :)

Please let me know if you have any questions

6 0

3 years ago