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dalvyx [7]
3 years ago
9

ANSWER ASAP!!!!! How many liters of a 10% salt solution must be mixed with 5 liters of a 50% salt solution to give a 20% solutio

n?
Mathematics
2 answers:
elena55 [62]3 years ago
8 0
The answer this question is 15 liters
lawyer [7]3 years ago
6 0

Answer:

  15 liters

Step-by-step explanation:

Let v represent the number of liters of 10% solution to be mixed with 5 liters of a 50% solution to obtain a 20% solution. The amount of salt in the final solution is ...

  0.10x +0.50(5) = 0.20(x+5)

  1.5 = 0.10x . . . . . simplify, subtract 1+0.10x

  15 = x . . . . . . . . . multiply by 10

15 liters of 10% solution must be added.

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3 years ago
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Evaluate the expression m^2 ∙ m^5 ∙ m^-3. Be sure to write your answer in simplest form.
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m^4

Step-by-step explanation:

To solve you combine all the exponents

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3 years ago
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(x÷(y÷z))÷((x÷y)÷z)<br>also the variables are not specified.
Bumek [7]
The answer is:  z² .
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Given: <span>(x÷(y÷z))÷((x÷y)÷z) ;  without any specified values for the variables; 
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we shall simplify.
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We have: 
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</span>(x÷(y÷z))  /  ((x÷y)÷z) .
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Start with the first term; or,  "numerator":  (x÷(y÷z)) ;
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x  ÷ (y / z) = (x / 1) * (z / y) = (x * z) / (1 *y) =  [(xz) / y ] 
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Then, take the second term; or "denominator":
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((x ÷ y) ÷z ) = (x / y) / z =  (x / y) * (1 / z) = (x *1) / (y *z) = [x / (zy)]
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So (x÷(y÷z))  /  ((x÷y)÷z)  = (x÷(y÷z)) ÷  ((x÷y)÷z) =

 [(xz) / y ] ÷ [x / (zy)]  = [(xz) / y ] /  [x / (zy)] =
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4 0
3 years ago
What is the measure of angle DEF to the nearest degree?
saveliy_v [14]
I would say the answer is 35.
8 0
3 years ago
Which of the following quantities are inversely proportional? WILL GIVE BRAINIEST
Effectus [21]

Answer:

option 1

option 3

option 4

Step-by-step explanation:

Inversely proportional means "one quality increases, the other decreases " or "one quantity decreases ,other increases. " Inverse relantionship, that's it.

option 1:

Since the volume is given as 56 and we know the volume is area of base * height, to keep the volume at constant [56], if height increases, area of base would need to decrease, and vice versa. So Inversely proportional.

option 2:

The time spend in plowing a field with a tractor with increase when we area using more fuel.So more fuel used means more time spent. So these are directly proportional, Not inverse.

option 3:

Since the price is a constant, the amount of length we buy more,the price per one yard HAS to decrease, and vice versa. So ,this is Inverse relantionship.

option 4:

If the number of identical tractors. increase, it will take less time to plow the set 358 acre farm. And vice versa. So this is Inversely proportional as well.

PLEASE MARK ME AS BRAINLIEST!!

7 0
4 years ago
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