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Illusion [34]
3 years ago
9

95. A 20-gallon alcohol-water solution contains 15% pure alcohol. How much alcohol should

Mathematics
1 answer:
navik [9.2K]3 years ago
4 0

Answer:

  1.25 gallons of alcohol

Step-by-step explanation:

Let x represent the amount of alcohol to add to the mix. Then the total amount of alcohol in the mix is ...

  0.15×20 + x = 0.20×(20 +x)

  3 +x = 4 + 0.2x . . . . simplify

  0.8x = 1 . . . . . . . . . . add -3-0.2x

  x = 1/0.8 = 1.25 . . . . divide by 0.8

1.25 gallons of alcohol should be added to make 21.25 gallons of 20% alcohol.

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Y+3=2(x-1) im not so sure that i got the answer correct.
Vikentia [17]
So just try it for x=1 how many will get for y 

y+3=2(x-1) for x = 1 will get y+3 =2(1-1) so y+3=2*0 so y+3=0 so y=-3 

x=1
y=-3 so choice A.(1,-3) is right sure 

hope this will help you 

8 0
3 years ago
the lengths of two sides of a triangle are 10 and 24. the third side is x how many whole number possible for x
Aleonysh [2.5K]

Answer:

  19

Step-by-step explanation:

The triangle inequality tells you the possible values of x are ...

  24 -10 < x < 24 +10

  14 < x < 34

There are 19 integer values of x in this range.

6 0
2 years ago
Which Product will result in a cell or difference of cubes?<br> Pls do not give any joke answers
Rom4ik [11]

Answer:

(x-9)(x²+9x+81); it'll give a difference of cubes

Step-by-step explanation:

Generally, the difference of cubes formula is (a³-b³)=(a-b)(a²+ab+b²), and the third option is the only one which fits it; with "a"= x and "b"= 9.

*The sum of cubes formula is (a³+b³)=(a+b)(a²-ab+b²); for future reference.

5 0
2 years ago
Read 2 more answers
If g(x)=1/x were shifted 3 units to the left and 3 units up, what would the new equation be
emmainna [20.7K]

Answer:

g(x) 1/3-4

Step-by-step explanation:

4 0
3 years ago
What is the sum of 5.3 x 10^5 and 3.8 x 10^4 in scientific notation?
Sedaia [141]
5.3×10^5=53×10^4
53×10^4+3.8×10^4
=56.8×10^4
=5.68×10^5. Hope it help!
3 0
3 years ago
Read 2 more answers
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