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Alex Ar [27]
3 years ago
13

Find the restricted values of x -7x/7x^2+x

Mathematics
1 answer:
Vera_Pavlovna [14]3 years ago
4 0

Answer:

2x

Step-by-step explanation:

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A Chemist needs to mix a 20% acid solution with a 50% acid solution to obtain 15 liters of a 34% acid solution. How many liters
Nuetrik [128]

8 litres (amount of 20% solution needed) and 7 litres for (amount of 50% solution needed)

<u>Step-by-step explanation:</u>

Let consider ‘x’ for 20% acid solution and (15 – x) for 50% acid solution. And so, the equation would be as below,

                         20% in x + 50% in (15 – x) = 15 litres of 34%

Convert percentage values, we get

                              0.20(x) + 0.50 (15 – x) = 15 (0.34)

                              0.20 x + 7.5 – 0.50 x = 5.1

                              -0.3 x + 7.5 = 5.1

                              0.3 x = 7.5 – 5.1

                              0.3 x = 2.4

x = \frac{2.4}{0.3} = 8 litres (amount of 20 \% solution needed)

Apply ‘x = 8’ value in (15 – x) we get,

                         15 – 8 = 7 litres

The value of 7 litres for (amount of 50% solution needed)

8 0
3 years ago
What does k and y equal?
Kaylis [27]
X and y vary directily means

y=kx

72=3k
divide both sides by 3
24=k

k=24
y=72
8 0
3 years ago
Chloe grew .52 inches this summer.Her brother Kade grew .53 inches. Who grew more over the summer?​
hichkok12 [17]

Answer:

Kade

Step-by-step explanation:

.53 is bigger than .52

8 0
3 years ago
Need help thanks in advance
EastWind [94]

Answer:  

Exact Form: 391 /12

Decimal Form:  32.58 3 (3 is continued)

Mixed Number Form:  32  7/12  

Step-by-step explanation: You evaluate and multiply the equation.

6 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST ANSWER!!!
krok68 [10]

Answer:

Im pretty sure its D A B

Step-by-step explanation:

I am learning about this

8 0
3 years ago
Read 2 more answers
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