What multiplication problem equals 130

Aleks04 [339]

X= 3r+5/2 is the answer I believe

4 0

2 years ago

Isabelle has a five-sided chicken coop in her yard. each side has an equal length. what is the total perimeter of the chicken co

Alik [6]

The total perimeter of the chicken coop if the length of one side is 3√5 yards is; 15√5 yards.yards

<h3>How to calculate the total perimeter?</h3>

We are told that Isabelle had a five sided chicken coop in her yard and that the length was equal in all the sides.

Now, we need to find the total perimeter of the chicken coop.

The length of one side of the coop from online sources is 3√5 yards.

Since the coop is 5 sided, it means that it is a pentagon and we know that;

Perimeter of a pentagon = 5a

Where a is length of one side of the pentagon. Thus;

Perimeter = 5 x 3√5

Perimeter = 15 √5 yards

Read more about Total Perimeter at; brainly.com/question/24571594

#SPJ1

8 0

1 year ago

How do you write 5 39/40 as a decimal?

valkas [14]

First you divide 39/40
you would get 0.975

7 0

2 years ago

A sells to b an item at 15% profit. B sells the same item to c at 20% profit. If c pays $1656 for it. What is the price at which

andrew11 [14]

Answer:

<em>The price at which A bought the item is $1200.</em>

Step-by-step explanation:

Suppose, the price at which A bought the item is $x$ dollar.

A sells the item to B at 15% profit. That means, the selling price to B $= x+(0.15*x)=1.15x$ dollar.

B sells the same item to C at 20% profit. That means, the selling price to C $= 1.15x+(1.15x*0.20)=1.38x$ dollar.

Given that, C pays $1656 for the item. So, the equation will be.......

$1.38x=1656\\ \\ x=\frac{1656}{1.38}=1200$

So, the price at which A bought the item is $1200.

8 0

2 years ago

Someone claims that the breaking strength of their climbing rope is 2,000 psi, with a standard deviation of 10 psi. We think the

denpristay [2]

Answer:

The sample size must be greater than 37 if we want to reject the null hypothesis.

Step-by-step explanation:

We are given that someone claims that the breaking strength of their climbing rope is 2,000 psi, with a standard deviation of 10 psi.

Also, we are given a level of significance of 5%.

Let $\mu$ = <u><em>mean breaking strength of their climbing rope</em></u>

SO, Null Hypothesis, $H_0$ : $\mu$ = 2,000 psi {means that the mean breaking strength of their climbing rope is 2,000 psi}

Alternate Hypothesis, $H_A$ : $\mu$ < 2,000 psi {means that the mean breaking strength of their climbing rope is lower than 2,000 psi}

Now, the test statistics that we will use here is One-sample z-test statistics as we know about population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\bar X$ = ample mean strength = 1,997.2956 psi

$\sigma$ = population standard devaition = 10 psi

n = sample size

Now, at the 5% level of significance, the z table gives a critical value of -1.645 for the left-tailed test.

So, to reject our null hypothesis our test statistics must be less than -1.645 as only then we have sufficient evidence to reject our null hypothesis.

SO, T.S. < -1.645 {then reject null hypothesis}

$\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } } < -1.645$

$\frac{1,997.2956-2,000}{\frac{10}{\sqrt{n} } } < -1.645$

$(\frac{1,997.2956-2,000}{10}) \times {\sqrt{n} } } < -1.645$

$-0.27044 \times \sqrt{n}< -1.645$

$\sqrt{n}> \frac{-1.645}{-0.27044}$

$\sqrt{n}>6.083$

n > 36.99 ≈ 37.

SO, the sample size must be greater than 37 if we want to reject the null hypothesis.

7 0

3 years ago