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galben [10]
2 years ago
8

A chemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. The table show

s the amount of each solution used. What is the value of x, the acid concentration of the first solution?
Mathematics
2 answers:
ikadub [295]2 years ago
7 0

Answer:

a

Step-by-step explanation:

nasty-shy [4]2 years ago
3 0
The 4-liter acid material was a lower concentration than 40%. Call it 4 liters of x percent acid.

4x+10*40
————— =30
X+10
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A piggy bank contains some dimes and nickels. There are 8 more dimes than nickels in the bank. There is a total of $1.40. How ma
Softa [21]

Answer:

4 nickels

12 dimes

Step-by-step explanation:

Dimes are worth .1 each while nickels are .05 each.

We have 8 more dimes than nickels. Let d represent number of dimes and n for number of nickels. This means we have d=8+n.

If all our nickels and dimes together are worth 1.4 then we have another equation .1d+.05n=1.4

Lets put our equations together:

d=8+n

.1d+.05n=1.4

‐-----------------Plug first equation into second.

.1(8+n)+.05n=1.4

Distribute

.8+.1n+.05n=1.4

Combine like terms

.8+.15n=1.4

Subtract .8 on both sides

.15n=.6

Divide both sides by .15

n=.6/.15=4

Remember there are 8 more dimes so d=8+4=12.

5 0
2 years ago
Orlando bought a new couch for $2,904, using the furniture store's finance plan. He will pay $121 a month for 24 months. Which e
jolli1 [7]
Answer : y=<span>2,904-121x , x for month 

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4 0
2 years ago
A video game sets the points needed to reach the next level based on the function g(x) = 8(2)x + 1, where x is the current level
Liula [17]
For us to determine the number of points that is needed in order to surpass or succeed the hardest setting of the game level 5, we use first the function g(x) to determine the total points required for the lower level.
             g(x)  = 8(2)(x) + 1
We substitute the x of the function with 5 since we are in level 5.
             g(5) = 8(2)(5) + 1 = 81

Then, to determine the points for the hardest setting, we multiply the points by 3 as given in function h(x).
              h(x) = 3(81) = 243

Hence, to succeed the hardest setting of level 5, one needs a total of 243 points.
7 0
2 years ago
Nora and Mindy are going to a movie. Mindy forgot her money and is going to pay Nora back later. The cost of the two tickets is
Agata [3.3K]

Answer:

$9.62

Step-by-step explanation:

15.50 + 3.74 = 19.24

19.24 / 2 = 9.62

so Mindy must pay Nora $9.62

6 0
2 years ago
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The answer is 2 miles or 3520 yards. (they are the same answer.)

If this helps, can you give me the brainliest answer? I need it...

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8 0
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