Ask question

Ask question

All categories

2 years ago

14

Ivan can assemble furniture set in 5 hours. If Daniel helps, they can finish it in 3 hours. How long will it take for Daniel to

finish the furniture set alone?

1 answer:

Airida [17]2 years ago

7 0

Answer: AAAAAAAAAAAAAAAAAAAAAAAA

wihgbfiqyeakudbferihyoskbfc

Step-by-step explanation:

You might be interested in

A boy rides bike at an average speed of 15km/hour, how long will it take him to ride 40km?

Lorico [155]

Answer:

1 2/3 or 1 hour and 20 mins

Step-by-step explanation:

4 0

3 years ago

Many people feel that the drying of pavement marking paint is much too slow. You spend several days looking for the fastest dryi

slavikrds [6]

Answer:

21

Step-by-step explanation:

Using<em> Simple Random Sampling</em>, we can estimate the sample size by the formula

$\bf n=\frac{Z^2S^2}{e^2}$

where

n = sample size

Z = the z-score corresponding to the confidence level 99.5%

S = the assumed standard deviation = 3 seconds

e = margin of error = 2 seconds

<em>It is worth noticing that the higher the confidence level, the larger the sample should be. </em>

The z-score corresponding to a confidence level of 99.5% can be obtained either with a table or the computer and equals

Z = 3.023

Replacing the values in our formula

$\bf n=\frac{(3.023)^23^2}{2^2}=20.5616\approx 21$

So the size of the sample should be at least 21.

7 0

3 years ago

A rectangle with sides of lengths 4/5 foot and 1/2 foot

Nadusha1986 [10]

The area would be .4 cubic feet. The perimeter would be 2.1

8 0

3 years ago

Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they

AleksAgata [21]

6x+8y=1,200and 150adults

4 0

3 years ago

Combine the following fractions by addition or subtraction as directed.

Marina86 [1]

Answer: $\frac{6}{y^2-xy}-\frac{6}{x^2-xy}=\frac{6(x+y)}{xy(y-x)}$

Explanation:

Combining the fractions, we have:

$\begin{gathered} \frac{6(x^2-xy)-6(y^2-xy)}{(x^2-xy)(y^2-xy)} \\ \\ =\frac{6x^2-6xy-6y^2+6xy}{(x^2-xy)(y^2-xy)} \\ \\ =\frac{6x^2-6y^2}{x(x-y).y(y-x)} \\ \\ =\frac{6(x-y)(x+y)}{-xy(x-y)^2} \\ \\ =\frac{-6(x+y)}{xy(x-y)} \\ \\ =\frac{6(x+y)}{xy(y-x)} \end{gathered}$

8 0

1 year ago