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Hatshy [7]
2 years ago
5

HELP ME PLEASEEEEEEEEEEEEEEEEEE

Mathematics
1 answer:
kumpel [21]2 years ago
5 0
For this case we have the following solution.
 First, let's give the variable a name:
 Let
 x = gallons of water to be added
 For the 10% solution we have:
 0.1 * 8 = 0.8
 Then, for 5% we have:
 (0.8 / x + 8) = 0.05
 Rewriting:
 (0.8 / x + 8) = (5/100)
 Answer:
 An equation can be used to find x, the humber of gallons of water he should add is:
 (0.8 / x + 8) = (5/100) (option 2).
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Which of the following expressions is not correctly written in scientific notation?
defon

Answer:

5 times 10 times

Step-by-step explanation:

i got it right on my test

4 0
2 years ago
Samuel says that 25% is greater than 0.3. <br> Is he correct?
kumpel [21]

Answer:

No

Step-by-step explanation:

25% as a decimal is 0.25

and 0.3 as a percentage is 30%

8 0
2 years ago
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At a farm the ratio of cows to horses was 7:2. If there were 21 cows at the farm, how many horses were there?
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3 years ago
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20 different comic books will be distributed to five kids. (a) How many ways are there to distribute the comic books if there ar
sveta [45]

Answer:

a) 21684

b) 15504

Step-by-step explanation:

a) Distribute the comic books as follows

only to 1 kid          one way   but we have five kids then  5

to two kids                         C₂₀,₂  =  20! /2! ( 20-2)!    =  20*19 /2  =   190

To three   C₂₀,₃   =  20! /3! ( 20 - 3)!       =  20*19*18 /6               =  1140

To four     C₂₀,₄    =   20 ! / 4! ( 20 - 4 )!   = 20*19*18*17 /4*3*2   =  4845

To five     C₂₀,₅    =    20!  /5! (20 - 5 )!    = 20*19*18*17*16/5*4*3*2*1

C₂₀,₅    =  15504

Then total ways of distribution are:

5 + 190 + 1140 + 4845 + 15504   =  21684

b)   C₂₀,₅  we know from a    that is equal to  15504

7 0
3 years ago
A mixture of chlorine and water contains a total of 60 gallons. There are 30 gallons of pure Chlorine in the mixture. (I) what p
ser-zykov [4K]

60 gallons of the whole thing, chlorine and water mixed.


one may note that 30 is half of 60, namely 50% of 60.


if there are 30 gallons of chlorine, 60 - 30, the leftover is 30 gallons, and that must be water.


so 50% is chlorine, and the other 50% is water.

5 0
3 years ago
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