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wlad13 [49]
3 years ago
8

A cold water tap can fill a tub in 6 minutes, and a hot water tap can fill the tub in 8 minutes. A drain can empty a full tub in

10 minutes. If both taps are on and the drai is open, how long will it take to fill the tub? It will take
how many minutes?
Mathematics
1 answer:
otez555 [7]3 years ago
6 0

Answer:

12 minutes

Step-by-step explanation:

The Hot tap fills 1/30th of the bath in 1 minute. The cold tap fills 1/20th of the bath in one minute. In one minute both taps together will fill (1/30 + 1/20) of the bath, which is 5/60ths or 1/12th of the bath. Since it takes one minute to fill 1/12th of the bath, it’ll take 12 minutes to fill the bath

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I had finish to solve the problems from the sentences,but I got stuck when I barely realized that the cost of one daylily I got
Genrish500 [490]
You lost minus when you were adding two equations.
-176= - 22x -12y
<span>144 =      6x   +12y
</span>-32= - 16x
x=2

88=11x+6y,
88=11*2+6y
6y=66
y=11

Check:
88=11x+6y=11*2+6*11=88 True
144=6x+12y=6*2+12*11=12+132=144 True

The cost of daylilies is $2.
The cost of pot of ivy is $11.


8 0
4 years ago
A collection of numerical information, such as the scores on a test, is referred to as simple random sampling.True / False.
Nimfa-mama [501]

Answer:

False. See explanation below.

Step-by-step explanation:

False

A simple random sample "is a subset of a statistical population in which each member of the subset has an equal probability of being chosen"

In other words that means in order to apply a random sampling we need to ensure that we have the same probability of inclusion for every possible element of the population of interest.

And for this case a collection of any numerical information is not referred as random sampling since we don't know if these scores are representative of the population of interest.

And we don't know if this information is obtained using any sampling frame or sampling methodology.  

8 0
3 years ago
I need help on number 2 please help me. Thanks. Happy holidays
Airida [17]
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So, Pages of picture book = 10 * 25 = 250
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So, Option (D) is your answer! Hope this helps!!
5 0
4 years ago
tại một cửa hàng , xác suất để khách hàng mua thiết bị điện tử là 0,3, xác suất để khách hàng cài đặt phần mềm là 0,4 nhưng với
Harrizon [31]

Answer:

http://eldata2.neu.topica.vn/TXTOKT02/Giao%20trinh/03_NEU_TXTOKT02_Bai2_v1.0014109205.pdf

Step-by-step explanation:

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3 years ago
Amanda's jewelry box is in the shape of a cube that has 6- inch edges what is the volume of Amanda's jewelry box
olga_2 [115]
Since volume equals LxWxH it is 6x6x6= 216
3 0
4 years ago
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