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Rashid [163]
3 years ago
7

Select all the true statements.

Mathematics
1 answer:
strojnjashka [21]3 years ago
8 0

Answer:

5+(-5)=0

-2+2=0

Step-by-step explanation:

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The amount of chlorine in a swimming pool varies directly with the volume of water. the pool has 2.5 milligrams of chlorine per
djverab [1.8K]

Answer:

Find out the  how much chlorine is in the pool .

To prove

As given

The amount of chlorine in a swimming pool varies directly with the volume of water.

The pool has 2.5 milligrams of chlorine per liter of water.

i.e

2.5 milligrams of chorine = 1 litre of water

There are 8000 gallons of water in the swimming pool.

As 1 gallons = 3.78541 litre (Approx)

Now convert 8000 gallons of water in litres.

8000 gallons = 8000 × 3.78541 litre

                      = 30283.28 litres

Now calculate chlorine in the pool for 30283.28 litres  of waters.

As

2.5 milligrams of chlorine = 1 litre of water

2.5 × 30283.28 milligrams of chlorine = 30283.28 litre of water

75708.2 milligrams of chlorine for 30283.28 litre of water .





3 0
2 years ago
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Can someone help “is 9 a factor of 23p - 47
quester [9]

Answer:

No.

Step-by-step explanation:

9 Does not go into 47 or 23

6 0
2 years ago
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Suppose s varies directly with t. When t=27, s=3. What is s when t=63?
adell [148]

Answer: s = 7

Step-by-step explanation:

27 is simply 9 times 3.

Thus, simply do 63/9 to get 7.

Hope it helps :)

3 0
2 years ago
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You are considering two cars that you plan on keeping for 5 years. One has an EPA combined city and highway rating of 33 mpg. Th
amid [387]

Answer:

a) $86.11

b) $467.33

Step-by-step explanation:

no. of gallons saved 'n' per year

n = (10000/33) - (10000/36)

n = 2500/99

Amount saved = 3.41×n = 3.41×2500/99

= $86.11

b) over 5 years:

86.11( 1 + (1.041) + (1.041)² + (1.041)³ + (1.041)⁴ )

= 86.11(5.427157431)

= $467.33

6 0
3 years ago
a team of 15 workers cad do a job in 7 hours. How long would this work take if the team has 35 people?
tankabanditka [31]

Answer:

3 hours

Step-by-step explanation:

15 workers * 7 hours = 105 worker hours

105 worker hours / 35 workers = 3 hours  

8 0
1 year ago
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