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Iteru [2.4K]
3 years ago
15

Please help a girl out I'm so confused

Mathematics
1 answer:
Sloan [31]3 years ago
5 0

Answer:

A= 16 B=28

Step-by-step explanation:

So the ration is 4:7, you have to find multiples that have that same ratio

Multiply both numbers by 4, this should get you

16:28

16 + 28 = 44

Therefore this is the correct answer

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A large mixing tank initially contains 1000 gallons of water in which 30 pounds of salt have been dissolved. Another brine solut
serg [7]

Answer:

(B)\dfrac{dA}{dt}=8-0.004A

Step-by-step explanation:

Volume of fluid in the tank =1000 gallons

Initial Amount of Salt in the tank, A(0)= 30 pounds

Incoming brine solution of concentration 2 pounds of salt per gallon is pumped in at a rate of 4 gallons per minute.

Rate In=(concentration of salt in inflow)(input rate of brine)

=(2\frac{lbs}{gal})( 4\frac{gal}{min})=8\frac{lbs}{min}

The resulting mixture is pumped out at the same rate, therefore:

Rate Out =(concentration of salt in outflow)(output rate of brine)

=(\frac{A(t)}{1000})( 4\frac{gal}{min})=\frac{A}{250}

Therefore:

The rate of change of amount of salt in the tank,

\dfrac{dA}{dt}=$Rate In-Rate out\\\dfrac{dA}{dt}=8-\dfrac{A}{250}\\\dfrac{dA}{dt}=8-0.004A

5 0
3 years ago
150 adults complete a survey 80 are women the ratio of men and women in its simplest form
zavuch27 [327]

Answer:

Step-by-step explanation:

150 - 80 equals 70

70:80 = 7:8

please give me brainliest, I'm going to cry if you don't >:(

7 0
2 years ago
Read 2 more answers
Plzzzzzzzzzz helpppppppp
Minchanka [31]

Answer:

i'd say do it with division what equals 31? im not going to say the staright up answer

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7 0
2 years ago
Help Fast Show WORK and. NO links <br> 5f = -75 check your solutio\
pantera1 [17]

Answer:

f= -15

Step-by-step explanation:

u just have to divide

-75/5= -15  so f equal -15

3 0
3 years ago
Read 2 more answers
Billy likes to go cycling.
Agata [3.3K]

Answer:

560 metres

Step-by-step explanation:

80 cm in metres is 0.8 metres.

After 1 revolution any point on the wheel will be back to the original position before moving. 0.8 times 2, which gives us 1.6 metres. In 1 revolution the bike travels 1.6 metres.

Now 1.6 metres times 350 gives us 560.

So the answer is 560 metres.

4 0
2 years ago
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