Ask question

Ask question

All categories

3 years ago

7

A piece of blue yarn is 5/ 3/7 yards long. A piece of pink yarn is 5 times as long as the blue yarn. How much longer is the pink

yarn than the blue yarn?

1 answer:

MaRussiya [10]3 years ago

8 0

Answer:

27 1/7

Step-by-step explanation:

Multiply 5×5=25 and afterwards multiply 3/7×5=2 1/7

You might be interested in

What is the idiom of don't beat around the bush

Nutka1998 [239]

Usually, this means just going with the flow, not actually doing the work, just look ing like you are. hoped this helped

6 0

3 years ago

If c+1/d=5 , what is the value of 30d/2c+2

klemol [59]

Answer:

3

$d\in R,\hspace{5}d\neq 0$

Step-by-step explanation:

You can solve for any variable. From the first equation, let's solve for c :

$\frac{c+1}{d} =5\\\\c+1=5d\\\\c=5d-1$

Now, replace the value of c into the other equation:

$\frac{30d}{2c+2} \\\\\frac{30d}{2(5d-1)+2} \\$

Using distributive property

$\frac{30d}{10d-2+2} =\frac{30d}{10d} =3$

However, keep in mind that this is true for:

$d\in R,\hspace{5}d\neq 0$

8 0

3 years ago

diana and marc are raising money for their class trip by sleling gift wrapping paper.marc raise 39$ by selling 5 rolls of red wr

Alex

They are selling the wrapping paper for $5 each and selling the foil wrapping for $7 dollars each.

39=5(5)+2(7)
57=3(5)+6(7)

8 0

3 years ago

A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. The mean is found to be 10.3

user100 [1]

Answer:

Confidence interval for the true mean number of reproductions per hour for the bacteria is (10.1,10.5).

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 10.3

Population standard deviation, σ = 2.1

Sample size, n = 728

Alpha, α = 0.01

Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.01} = \pm 2.58$

$10.3 \pm 2.58(\frac{2.1}{\sqrt{728}} ) = 10.3 \pm 0.2008 = (10.0992,10.5008) \approx (10.1,10.5)$

6 0

3 years ago

What is the value of g^-1(1)

gladu [14]

According to the graph, <em>g</em> (-4) = 1, so <em>g</em> ⁻¹(1) = -4.

4 0

3 years ago

Read 2 more answers