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Naily [24]
3 years ago
9

A pharmacist has 18% bleach solution. How much of this solution and how much water must be mixed together to make 10 liters of a

12% solution?
Mathematics
1 answer:
kkurt [141]3 years ago
4 0
X = the amount of water to add
10 - x = amount of 18% bleach to add

.18(10-x)= .12 x 10
1.8 -.18x =1.2
-.18x = -.6
x = 3 1/3 liters water
therefore 6 2/3 liters bleach

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How did astronomer Yi Xing (A.D. 683-727) contribute to the development of mathematics in china?
SSSSS [86.1K]

Answer:

Yi Xing invented the astronomical clock and introduced some new methods of interpolation in mathematics.

Step-by-step explanation:

Yi Xing was both an astronomer and a mathematician during the era. He invented the astronomical clock which was more accurate than the initial water and Sun's clock in use.

Furthermore, Yi Xing also discovered some new methods of interpolation in mathematics of which the meaning and interpretation became controversial. Interpolation is a method majorly in mathematics that can be used to estimate a value of a function from its discrete values. It involves first order differences and second order differences.

Also, Yi Xing was able to design a calendar in A.D. 727.

4 0
3 years ago
Use an appropriate procedure to show that x-4 is a factor of the function f(x)=2x^3-5x^2-11x-4. Show work pleassseeee
mamaluj [8]
F(4)=2(4)^3-5(4)^2-11(4)-4=128-80-44-4=0
Solution is 4
6 0
3 years ago
How do i write the answer to 341+172 in expanded form​
iren2701 [21]

Answer:I think not certain.it will be 300+100+40+70+1+2

5 0
3 years ago
Solve for x in the equation X2 - 10x+ 25 = 35.​
zlopas [31]

Answer:

x = 5 ± sqrt(35)

Step-by-step explanation:

X^2 - 10x+ 25 = 35.​

Factor the left hand side.  This is the difference of squares.  a^2 -2ab - b^2 = (a-b)^2  where a = x and b = 5

(x-5) ^2 = 35

Take the square root of each side

sqrt((x-5) ^2) =± sqrt(35)

x-5 = ± sqrt(35)

Add 5 to each side

x-5+5 = 5 ± sqrt(35)

x = 5 ± sqrt(35)

8 0
3 years ago
Faye is making bead necklaces. She has 243 beads . Faye makes 51 with the same amount of beads on each necklace. How many beads
Andrej [43]

Faye has 243 beads.

She uses 51 for each necklace.


243/51 = 4.7...

243-51-51-51-51=39.

She can make 4 necklaces, with an extra of 39 beads.


8 0
3 years ago
Read 2 more answers
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